Irrelevant. Thomas in fact could have turned out a disaster, but did not. We have zero reason to believe that the elder Bush would have anticipated how brilliant Thomas would turn out to be.
But Thomas did turn out to be brilliant, with wonderfully written opinions (I have read them) and opinions consistent with the Constitution.
It was the Thomas we all knew that W promised to nominate. The man we KNEW to be brilliant in his defense of the constitution.
W has already spoken: "I offer a cypher. I do not grant you the dignity of offering you anything you could possibly know. I don't deal in life that way, I deal in life by fiat."
Well that only makes my point. Dubya knows Miers quite well, and apparently has every reason to believe she will cement his legacy of turning around the judiciary. We have far more reason to believe she will be excellent. First Dubya is very sensitive to the issue and clearly understands that it is a cornerstone of his legacy, as opposed to his dad who didn't seem to care much. Second he has learned from his dad's two biggest mistakes, raising taxes and David Souter, and is determined not to repeat either. Third his appellate court nominees have been outstanding, and the most important person in helping him pick them was Harriet Miers. I see way more reason to believe Miers will be a great justice than we had with Thomas.
Now you're showing your true colors.