I have been wearing them everyday since last friday (even slept in them a few times to help the break in process) and they have stretched out .75 inches, so they're at 16.75 inches at the waist, and I'm assuming they will give a little more with some more wear.
Thanks! I just purchased a W32 that hasn't seen that much shrinkage in the waist. Might try to give them another hotsoak before i wear them.