Is there any ETA from Asus for a firmware update that will help the other wireless adapters that don't work well on 5 Ghz?
Is this a case where the Intel folks were the squeakiest wheel and they got the grease?
This is a case where something was broken starting with a very specific driver version (5.110), and it was easy to reproduce (failure to connect for anyone using an Intel card on the 5 GHz band with 40 MHz channel width, could be reproduced 100% of the time).
If there are other issues, then people will have to come up with specifics to confirm that there is really an issue with a specific wireless card model, and not something with their environment. So far, I see a lot of vague "I have issues. Please fix it!" where people don't provide exact card model and card driver version, and what steps they have taken so far to troubleshoot it. It's hard to troubleshoot anything in such cases. Quite a few of these cases are definitely NOT a problem with the router - not everyone's case is the same.
Details are critical in such cases.