I've heard from a couple of FLGS here that they did not go all in on stock of 5e materials, because they got killed and wanted to play wait and see. They confessed they were blown away by demand that they did not anticipate and were out of stock opening weekend.
And the other thing I've started to hear are a lot of people who had preordered on Amazon, but then couldn't wait and ran out to FLGS and tried (some successfully) to get an early release copy. Some canceled their Amazon preorders and others are kept the orders alive to gift their 2nd PHBs.
I kept my 2nd Starter Set, but I canceled my Amazon PHB and HotDQ order after picking them up locally. Kind of regretting it even though I have no reason to get an extra copy.