Was The Doctor talking rubbish?

Just before the Big Bang 2.0, The Doctor and Amy had this conversation:

The Doctor: There's going to be a very big bang. Big Bang Two. Try and remember your family and they'll be there.

Amy: How can I remember them if they never existed?

The Doctor: Because you're special. That crack in your wall, all that time, the universe pouring into your head. You brought Rory back. You can bring them back, too. You just remember and they'll be there.

Why did Amy need to remember her parents to bring them back? Wasn't Big Bang 2.0 supposed to do this job? Amy needed to remember The Doctor because The Doctor was at the heart of explosion (Big Bang 2.0). Why were her parents as special as The Doctor?

Also, when did she brought Rory back? The Rory there was a plastic toy designed by enemies of The Doctor. How has this anything to do with Amy's memory? The enemies only go through her childhood books.

Was The Doctor talking rubbish after being shot by a Dalek?