Given how insanely fickle the Anyone But Romney crowd have been I wouldn't be surprised to see Perry rebound and end up leading the national polls again at some point before collapsing. Again.
Newt Gingrich is also due his turn as shiny Tea Party darling for a month, so maybe he'll start making up ground in polls.
Yeah, I think it is still early to call it. Romney has never polled above the mid/high twenties which is embarrassing for someone that has been in campaign mode for 7 years. I wonder what that does to your self esteem.