We so-called experts -- and trust me, when we apply that "expert" word to me, we're using it very loosely -- have spent a lot of time talking about a handful of question-mark positions on the Green Bay Packers' depth chart during the first seven days of practice.

But the position I wonder about the most is who'll start opposite Donald Driver at wide receiver.

Now, it's not like we've ignored the problem there. Tom Silverstein and Bob McGinn of the Milwaukee Journal Sentinel, Pete Dougherty and Rob Demovsky of the Green Bay Press-Gazette and I have all addressed it in some form. But in the last several days, we've spent more time on other topics, like quarterback Brett Favre's outlandish most-talented-team remark; A.J. Hawk's marriage and $37.5 million contract; Ryan Pickett's car accident; and the uncertainty at left tackle behind Chad Clifton, who hasn't practiced since Sunday night because of a right knee problem.

To me, finding a suitable running-mate for Driver is the key to whether the Packers offense will be respectable or god-awful. I doubt they'll be fantastic -- even if halfback Ahman Green returns to form with the help of backups Najeh Davenport and Samkon Gado -- but if no one emerges at wideout, Favre will revert to his frustrated gunslinger ways, taking too many chances because he doesn't trust his skill position personnel.

That's why, if I were a Packers fan, I'd be excited about rookie receiver Greg Jennings. As I wrote in today's Wisconsin State Journal (www.madison.com/wsj/home/sports ) less than a week into training camp, Jennings, a second-round pick out of Western Michigan, has made the biggest impression of any player on the 90-man roster.

There was no missing Jennings on Tuesday night when he hauled in a 57-yard bomb from Favre during that night's practice, and there he was again on Wednesday afternoon, snaring a Favre pass on a crossing route and running away from the defense.

While there are questions about Jennings' size -- at 5-foot-11 and 198 pounds, he doesn't fit coach Mike McCarthy's big-receiver prototype -- his football IQ is off the charts; offensive coordinator Jeff Jagodzinski said he's smoother than any other receiver coming in and out of breaks (Driver included); and he seems to have exactly the attitude you want a rookie to have.

"I can see why he had success in college, and I can also see why maybe he was overlooked,'' Favre said. "Sometimes size and speed play such a big part in decisions of an NFL team and you overlook the most important thing: Intangibles. Can he get open? Can he catch? Can he catch in traffic? And some of those things remain to be seen, but I feel like he's kind of a natural at what he does.''

Don't expect Jennings to have a monster year like Javon Walker's 2004 season, though. Only five of the 546 wide receivers drafted from 1990 through 2005 have had 1,000-yard seasons as rookies: Joey Galloway (1995), Terry Glenn (1996), Randy Moss (1998), Anquan Boldin (2003) and Michael Clayton (2004).

But I'll guarantee Jennings is more productive than Walker was as a rookie (23 receptions in 15 games). Robert Ferguson was a ghost his first season (zero receptions, inactive for 15 games) and if he doesn't pick up his game over the next month, Jennings will be starting ahead of him and fellow veterans Rod Gardner and Marc Boerigter.

That said, there's still plenty of time for those veteran receivers to earn the No. 2 spot. But my money's on the rook. As Favre put it, "It just comes natural to him,'' and I've got to think he'll have a bigger impact on the Packers than the three receivers taken ahead of him -- Ohio State's Santonio Holmes (Pittsburgh, 25th overall), Florida's Chad Jackson (New England, 36th) and Miami's Sinorice Moss (New York Giants, 44th) -- will on their teams.

"Coming out, I knew my football awareness and my knowledge of the game was a lot higher than a lot of players (like Holmes, Jackson and Moss) and I knew it would help me in the long run, regardless of where I ended up in the draft,'' Jennings said. "Right now, that's what you see -- a guy who is comfortable but at the same time can learn and am willing to learn.''