No, I haven't yet, but there will be a walkthrough before final closing, and I will be sure to do this. I'll even flush both toilets. The home inspector did however, test the plumbing, and I can only assume that he tested for this. I'll have to ask him specifically now, thanks for bringing that to my attention, JB!
Please post what the inspector says to your inquire as I doubt they check for water hammer. Here they check to see the pipes (right dia. correct slopes etc) are connected correctly and that they do not leak before the walls are closed in. Also the pipes are secured well more than likely reduces the noise.