Nope, not really, I find lot of good tracks still for use in my mixes. Like Ecliptik said, search and dig for those gems. If I hear bad material in it, I just move on, no matter how good it sounds. Only problems I’ve had lately is dubstep. To find a good clean dubstep track takes the most searching but thankfully I don’t do all dubstep mixes. Though since most have raised the BPM of the genre lately, I might make one soon.