Was the Miers appointment done purposely?

I'm not one to spread conspiracy theories or to mobilize the tin-hatters, but through some small research I've done, I believe the Miers nomination was done on purpose.  Bush knew she would never get confirmed and if talks of her getting confirmed were to occur, he would make her drop out.  This would be done of course to allow a well-known conservative to be embraced with open arms by conservatives and to have less opposition by liberals.  I suspect the President wanted a longer period in between Miers' fallout and the Alito nomination, but the CIA leak scandal convictions left him no choice but to make a quick appointment. 

While this all sounds like a possibility, I'd like to think this level of thinking gives the President a little too much credit.  Nevertheless, what's done is done and we must now focus our attention to the Senate Committee Hearings and hope that they can learn enough about Alito to make a judgement whether he is a correct fit to replace Sandra Day O'Connor -- the pivotal swing vote on many contentious issues and first female justice.