I have set an ASUS router to 2.4 GHz N-Only, but Acrylic WiFi Pro lists it as a WiFi B,g,n supported AP. With supported rates 1Mbit, 2Mbit....
There are some AP's that Acrylic WiFi does detect as g,n only, 6M/12M minimum, so the app seems consistent. One thing that's not, is the reported beacon...