Definately not. I sorta agreee with what somebody said above. The audience has changed. But I don't believe there was any sort of movement where people said "let's be cool and cheer the heels." If that was true, that movement started way more than a few years ago. There was this little stable I don't know if you heard of called the nWo. They got cheers every week and during the beginning of the nWo, they were some of the greatest heels of all time... collectively. But they got cheers... why? Hogan. People were attatched to Hogan because they grew up watching him, loving him, and admiring him. Not because of some movement where a group of people tried to be different and just cheer the guy they weren't supposed to cheer.
With the internet now and spoilers and all that kind of stuff, I think the older wrestling fan doesn't care about face or heel anymore. It's too hard to keep a story going, or a debut secret, or a return on the hush hush without the IWC finding out about it. So my theory is just pretty much the older, wiser, and more mature the wrestling fan gets, like I said above, the less they care about the conventional face/heel nature of wrestling itself. I am included in this. When I watch wrestling, I just want to be entertained. I want to see a good athletic match between superstars that are talented in the ring, have good chemistry, some good spots, maybe a couple false finishes, and be carried on what seems like a roller coaster through the match. That's how you gain the applause from me. That's why at events, I will cheer the Miz, Punk, Jericho, Ziggler, etc... But I also enjoy Taker, HBK, Morrison, Kofi, etc...
So again, I think this applies to many other fans and not just myself. We cheer the talent, not the face/heel concept. But that doesn't mean if you cheer the heel, the heel is doing a bad job. We just don't care about how the conventional wisdom tells us who to cheer.