I don't know what that means. Nor do I understand how you think it bolsters your argument.
The GOP doesn't "nominate RINOs to high office" as you put it. The democratic primary process is what selects general election candidates for district, state and national offices. If purely orthodox conservatives is what the constituency wants, then that is what the constituency will get.
As for RINOs losing in landslides, usually that's not the case. In fact, RINOs are usually located in very competitive districts and states, and that's the reason they're RINOs in the first place. It feels like you, and many other apparently, think that these moderates are where they are because of some secret cabal that's hand-selecting less-than-perfectly conservative Republicans. The moderates are moderates because they reflect the ideological make-up of their districts. It's not the other way around.
2010 is going to be an interesting year. The political landscape doesn't favor the GOP in the Senate races. The majority of races that are being contested are in states that voted for Obama last year. In addition, the GOP has at least 5, perhaps as many as six Senators that are retiring. That's not good. The majority that the DEMS currently ejoy is not filibuster-proof. But, if they can pick up a couple more, or heaven forbid 4 or 6 more seats in 2010, the agenda that Obama, Pelosi and Reid will be able to purse will be far to the left of where they are today.