I personally think most would suck at pes. Since it was molded after real life football situations, perhaps having real life experience would help? Perhaps someone like Messi can only think about dribbling through teams using only 1 player, which usually is not quite as effective as a good passing game.
I've seen NHL, NFL, and NBA players play the games and the less talented players are always the better ones. Less talented players also usually make better coaches. The reason is because they try to come up with tactical advantages to make up for their inferior physical talent. So perhaps us average Joes would be better than those stars because we are forced to rely on our brain while they can easily rely on their physical talent.
You would think that a real guitarist would be great at Guitar Hero. Afterall, it involves playing notes with a plastic guitar and going with a rythm as well as having great coordination between their hands, something they're great at and have been doing for years. But in truth they really suck and gets murdered by a 9 year old kid who has only been playing for a year.
I just felt like talking about something else for a change instead of the constant bitching and moaning threads about how much pes2008 sucks ass.