They say that they don’t have a minimum speed requirement and the speedtest result doesn’t affect your application. Also considering that they specify that you choose the node geographically closest to you (instead of the lowest latency one) and the only other information in the test is latency, it does sound like they’re either looking for vpns or your location.
IP is quite unreliable when it comes to geolocation, especially if you have a dynamic ip
Personally just decided to ‘practice’ all day everyday at school without coming out to people. Had to keep a water bottle with me all the time to keep my throat from drying out. I’ve found that speaking brighter sounds more feminine but takes more air, which causes dryout.