@Seth:
@seamill. I don't have a clear answer for you, so I'll ramble a bit.
It seems to me, if you are willing to sell and rebuy anyway, that you have little to lose by trading the 32 for the 33, except the risk the waist stretches too much with the 33.
It's not exactly an apples to apples comparison because the 33s have been hot soaked. So you are measuring a hot soaked pair to a "stock" pair. The 32s might tighten up more once they too are hot soaked and therefore measure smaller. Both will stretch some in the thighs whether you soak them or not. And both will stretch in the waistband too. An hour is not enough time to get a sense of what the thighs will do. Mine were a bit painful for a good two weeks of wear before the thighs relaxed enough.
Also, you might end up deciding according to the thigh measurements and then end up with a waist that's too big. That leads me to another possibility - if you are really having trouble sizing according to the thigh measurements, then the 666 model might not be a good fit for you. The 634-XHS might be better. There you can focus on the waist and not worry about the thigh: it will generally have enough room.
Thanks for the info! Funny enough I just sold my 634-XHS because they were too big - haha. I have big thighs but the cut is too wide/relaxed for my proportions (no ass). I actually have a pair of 666S in 33 that fit just fine, but the cut on these seem to be much slimmer. I went through with the trade and they'll be here tomorrow. If they fit at least a little bit like the 32s then I'll put some stock into them stretching and start wearing them. The pain seems to be worth it due to these evo pics