When you have the basic skills and knowledge, I don't think anybody would care if you'd use all the possible tools in PS.
(for instance the dodge thingy, that everyone says you should avoid...it's silly, even people like Marco use it...the trick is to use it correctly!)
BUT, if one lacks the skills and instead of improving them he/she starts "masking" his mistakes by "pretty brushes"/"pretty layers"/drawing the same thing over and over again, and etc...I would care about that.
Instead of praising it as being "AWESOME", I would point out their mistakes.
The problem begins, when those artists are constantly reassured and reinforced by their friends who make absolutely the same mistakes, and they simply stop listening to anyone who does not praise them for being great and awesome.
I've seen this on Conceptart, on DA and on other sites...when it starts, it spreads like wildfire and clones more and more of those artists.
Frankly i stopped caring about DA and CA a long time ago, simply because they are over populated, there are some great artist on these sites who produce extraordinary art, but often they simply get lost in the crowd.
To me those sites are like Facebook, people browse and "like" whatever is "shiny"/"nude"/"funny"/etc...they rarely stop to give a useful crit...and they imo often do not care about the art.
I would definitely suggest you to try Painter, the fun thing is that you can combine between the effects in PS and the "paintry" feel in Painter - to get the best possible result.