I asked an American friend of mine and they pronounce the 'r' and the 't'. They literally say it how it is spelt.... This is completely insane to me, it's the direct equivalent of pronouncing jalepeno with a J, but I guess if they're never taught any different...
I am aware of the French pronunciation of that word and the fact that the 'r' and 't' are silent. It also irritates me when people pronounce those letters. To be fair, Gates was wisely leaving those letters silent, but her pronunciation was still a little off.
It's hard to explain the proper way to say it in writing, but I think it's more like “Qua Soh” (even the 'n' is silent). I can't decide what's worse, when people totally Americanize it by saying it like CRA SONT, or when they do a rather bastardized version of the proper pronunciation like Gates did.