I think this is a bit of an over simplification of the issue. Android devices have had similar issues with wifi. The problem is MS can't possibly test every router configuration and some issues may be related to the Surface wifi software while others may be related to a user's setup. Sometimes it takes being in the wild to get enough information to correct the issue. One of the first things users experiencing wifi issues should try is a reboot of the wireless router and update of the wireless router firmware regardless of whether or not other devices are working on the wifi.
MS does appear to be aware of the issue:
Microsoft Surface users complain about Wi-Fi problems - Computerworld
MS moderator responded on 11/5, that's more than 2 weeks ago. no further response or resolution. i guess they wanted all the 14 day returns to expire.