Some people are trying very hard to deny reality. A lot of the current delegate math includes unbound delegates who will be chosen at state conventions, where anything can happen. Ia, Co, and Mn are all unbound, and Romney could easily walk away with 25 from those states. Plus, he has been campaigning in territories and racking up delegates there, as well as campaigning in primary states with bound delegates. He just has a better campaign strategy of winning the nomination than the rest.
It is true Romney’s strat is more effective. I wouldn’t say better, since Santorum and Gingrich’s strat is better, it just hasn’t materialized. However, I’d expect the Not-Romneys to coalesce and deny Romney delegates in most caucus states. WA will be the big player in that, since Romney has 25 delegates in some estimates from there. If the Not-Romneys unite, he can be denied all but a couple from the one or two uber-liberal Seattle area districts.