We can speculate about what would've happened in 2010 until the cows come home. It's not 2010 anymore, and unless Bennet faces a similar atmosphere, it's reasonable to assume he'll be favored, especially since the Republicans don't exactly have a juggernaut to run against him.
He's right actually. Calamity Jane would've beat Bennet.
But who do the pubs have that is even comparable? Cynthia "We defunded Planned Parenthood!"/"I might support gay marriage, but I also might not" (real quotes from her btw) Coffman? She's 4 months into her new job and as dense as a doornail. Ellen Roberts? She doesn't know what Roe v Wade did.
And now the entire staff of the COGOP just resigned in response to Ryan Call losing his leadership election. If things continue at this pace, Coffman might not even keep his House seat. The COGOP is in total civil war, has no credible moderate candidates... It's bad for them. They had better hope for Rubio and/or Paul on the Presidential ticket, otherwise it could be a real bloodbath in 2016.
I think they should honestly nominate John Elway for Senate though. The old ham sandwich has been threatening to run since Salazar, so why not give it a try. He has no record he'd need to flip-flop on.