I think it also has much to do with the type of board you are riding!
I can flat base my Travis Rice at high speed on ice no issues! My Kessler Ride is even better & faster when flat based - with KST tech I often flat base it (little break) after a big long massive speed push.
Having said that, I took out a Nitro Pentera on a demo ride the other day and can tell you the board was very twitchy! Had to have it on edge most of the time and was much harder to flat base (flats and cat walks)!
So I'd say board have something to do with it as well as technique.
All the best.