In Gregor-the-Guru Hohpe's writeup of 2006 JAOO-Conference I found an interesting statement on MDA:
"... we discussed the trend towards MDC –Model-driven Crap."
As I'm personally more a friend than a foe of model-driven approaches, I'll let Gregor speak for himself. You got to come to your own conclusion concerning models, meta and such stuff. At least I found out in real projects that MD-approaches CAN help some people!