Nothing like statistically small samples to make a point.
Depending on conditions I can get a few in most match types, the issue however is that it's just not up to realistic levels. It should at first class and test level be about 4-5 wickets in an innings on average. That is, it could be 1, it could be 8 for any innings, by over a long time it should even out at around 4-5 when you count them all up. At this point in time getting 4 odd is strange enough for people to post videos of, and that speaks volumes about the problem.
I still don't think it's the physics that are entirely to blame here, but rather the AI still needs some tweaking (this is not the swear filter, I actually mean it needs a tweak). The AI of course would need to be made a bit more solid in other areas (in particular I think the dressing room shot needs to be looked at, particularly in first class and tests), and I have a suspicion this might also be part of the problem (that is, the AI too easily give away they wicket in other manners, making the edges rarer in comparison). I'm sure Big Ant will be working hard on this, if not now, then after the Xbox 360 problems are sorted.
I'd also add something else that is disgustingly obvious in the videos you've been posting. Some of their edges are heading for first, if not second slip and the keeper just casually takes them like it's nothing. Player momentum and reactions are well and truly an issue.
Speaking of which, so is AI pacing, particularly with running between the wickets. They aren't even likely in the slightest to get run out it seems, and will give up easy singles (and doubles, and triples) for absolutely no reason whatsoever.
Good bowling by the way.