I retested the Spit 14 in both directions. I didn't do as well as I did in 2006, the No Flaps turn was slightly worse and moved a few places down the list. It could be me, or the flight model, it wasn't a radical change. I'll post up a new revision once we have a few more checks done.
But in regards to Left Turn vs Right Turn, it makes no difference as far as ultimate radius/rate goes. As I learned the last time, people think planes turn better one way or the other because it's easier one way than the other. In the Spit, when you kick in WEP it's really hard to ride the edge of a stall when turning Left, I had to make a heck of a lot of turns before I had three good ones in a row. The nose wants to jump up or down like a banshee. Turning Right, it's much easier to control , (but still not easy). The speed and time measurements were the same in both directions.
But yes, given a choice, turn Right if you are in the 14.
Since the Spit 14 probably has the most overpowering torque/massive prop for plane weight, I didn't recheck the Tempest, Typhoon, or others. I'm glad to review/add your tests though!