Bobby almost always uses half beat hi hat and ride beats when he could definitely use quarter or eighth notes. According to some drummers I know, that is a strange thing to do. Pete did use eighth notes and sometimes quarter notes. On Tested only something like 3 songs use eighth notes, and quarter notes aren't exactly plentiful either, but he tends to hit the hi hat at the same time as the snare, which is quite uncommon. Also on Tested, there are a couple of times where he sounds like he is doing quarter notes, but really he is doing eighth notes, just accenting on the quarter.