After reading McCain's 2008 opposition document on Romney,

Bumpersticker poll in Colorado:
1) Obama 2008 Stickers
2) Anti-Obama Stickers
3) Obama 2012 Stickers
4) Romney Stickers

Yard signs? Seen a couple Romney & Joe Coors signs but nothing for Barack yet.

Yard signs are a function of the state & local campaign offices. If they decide to hold off on making them available for a few weeks, that's their decision. Don't read too much into that....