Here's a picture of my 12k + mileage 2010 L99 I took when putting on my Bo White ported TB. Sure, low mileage, but it's pretty darn clean. I'm still going to put on a catch can on it eventually. Why? Because I can and you can't stop me. I believe in filtration of any type of oil vapors going back to the intake if it's reasonably possible. While it may not hurt it to not run one, having a little insurance is a good thing as well. Some of you that debunk the catch can also have mods I think are a waste of money as well, so we'll just call it even.
from the thread:
http://www.camaro5.com/forums/showthread.php?t=388262