Nope, that really isn't a factor. It's the OVERRELIANCE on the COLLAR TIES. Too many of Iowa's guys, to be fair its usually when they are wrestling the top 8 or so guys at their respective weight classes, almost always look they they are pushing and pulling the whole time in neutral without creating any offense. Then, once they are basically as tired out themselves as the opponent they were trying to tire out, they almost always get taken down from space.
The "Iowa Style" preached scoring a ton of points by creating a lot of offense. Instead, now most of the guys bog down against the better opponents because they worry so much about controlling that tie and moving their opponent with constant, heavy hand pressure.
Ben has actually been pretty clear on the above, and it is basically the one thing I have to agree with him about when assessing the current Iowa structure. Hell, if they want to still try to be so collar ties dependent, why not start at least using something from the slide-bys/elbow passes/drags series. Everyone has adapted and the hi crotch/fireman's and head trapped single legs(true opportunites to score with them) aren't there like they used to be...