Jacques actually kicked butt in his first year too... he was just edged out by his teammate, Damon Hill, for the WDC in his rookie year. Jacques brought many of the things he learned in CART with him to F1. Like Montoya later on, his ability to perform on cold(er) fresh tires amazed the team. He also brought with him certain preferences for wing angles and front end setups that they apparently hadn't thought of. I'm not sure that Bourdais brought any of that to F1 from CCWS, since by the end it was so spec in nature and so far behind F1 in terms of technology and engineering. I don't rate Bourdais as high as some, since I think he and Newman-Haas beat a lot of weak competition. I do like and respect Bourdais though. But he didn't roll over any drivers of the Montoya, Moore or Zanardi caliber. He was very good and made the best of his equipment. I just think he smacked around some weak kittens and that made him look better than he was. It's really too bad that Allmendinger left. Those two seemed to be well matched. Sort of like Bourdais and Vettel.
I agree that Villeneuve went out on a down note, but most of them do. They hang on too long. I think his biggest mistake was sticking with Pollack for as long as he did.