Yes, but only in Europe so far. No stock/listing on amazon.com that I know of.
I highly doubt this is related to the monitor at all.
Starting to think we're gonna have a panel lottery with these. If so, expect them to be hard to get. People will buy them, and if they don't hit 100 hz, then they will swap them out. So stock will be really low. I'm hoping Acer will issue a firmware upgrade or something that will get us all to 100 hz stable. Panel lottery sucks.
Actually panel lottery is looking quite good so far from what I have seen, at least compared to other "problematic" monitors like the ROG Swift or XB270HU.
The issue with not hitting 100 Hz is a panel issue most likely and I doubt any firmware update will ever fix it, 100 Hz is also almost the limit of the DP 1.2 bandwith with g-sync included (I believe the limit is 109Hz?). If you get a panel that flickers at 100 Hz and not at 95 then you have a 95% chance of the issue being the panel/module itself, I'm leaving a 5% chance it is not just in case. That's my opinion after everything I've read at least.