some bikes do some don't. I am sure there is a way to fix it. but nobody knows how yet in the 2008-2010 bikes and the harley shops don't work on them much. So they blow you off I have some ideas but I will wait till I am out of warranty.....like the poster said he has did some research and he noticed the problem.... So it is not in our heads.
I have an 08 and sometimes when the bike is idleing it will hunt around from 1000-2000 rpm, it's a little annoying but it doesn't do it all the time.
If anyone finds a fix please let me know.
My 08 XT would do the HUNT for idle, and sometimes hang at 2000, but after a few thousand miles it hasn't happened since, I now have over 30k miles on it. I am gonna do the breather reroute when I get my catch can built