Anytime the term "mega-church" is posted, you can expect the same Pavlovian response.
It's one of many hot-button phrases like "purpose driven" that are just irresistable to some.
Interestingly, the objections here aren't to size (which is the reason I wouldn't attend a mega-church), but to the idea of seeker churches. I think they have their place. Some people don't trust God enough to believe that he will guide them to a church with deeper teaching when the time is right.
I trust God.