It's a good point SilentBob... I had a theory that 7.14 might be the magical average Amiga speed (between PAL & NTSC)...
So, in an attempt to find an average I did:
(7.09 + 7.16) / 2 = 7.125
I was hoping the average would be the magical 7.14 - but alas, it's not
So I don't know the answer either