Water has to sit on a wood floor for quite some time to cause it to warp.
Well it can leak under the flooring if there is an opening and sit there, despite the best efforts of folks to dry the top layer. We learned this the hard way due to our own inexperience years ago, but being as he is experienced in this stuff and we were not, you think he would have figured that out. I'm going to give him the benefit of the doubt and say that he knew it was going to seep under and warp so planned ahead of time and moved up the replacement they were planning anyway--that's how I read into it--not sure why even reveal the wood warped though if you were replacing it anyway except to placate the dummies who are down on their luck from thinking he's an evil 1%er with money to blow on renovating his house.
Again I say though, if you are knowledgeable about this sort of thing and considering the vast amount of online knowledge on just about any stuff home repair (or anything else for that matter) why would you even ask the opinion of dipshits like DUers, many of whom can't even manage to keep their car in the driveway from the repo man and depend on Obama to keep them at 300 plus pounds?