You've had it for 3 weeks, whereas CellGuy has used it for 2 years. I've also used CM and numerous other ROM's for years and decided to stop using them simply because official firmware is simply better, is backed up by far larger teams of professional engineers, but most importantly the evolution of Android OS has surpassed ROMs which were more of a necessity of sorts back in the versions prior to ICS but are now more of a tinkering/hobby niche. Although I'm not debating that from your 3 weeks experience and high standards you haven't experienced any problems but CellGuy was pretty accurate. CM (and other ROM's) do indeed have issues of their own and always have. CM's own official buglist is substantial enough to make that pretty clear. I'm not saying they're terrible or unusable. And some devices will have less problems on a particular ROM than others, YMMV as far as that's concerned.