I just tested render time from m2t to Cineform intermediate, no FX, on both V6d and V7. 10 second clip. Same machine, same settings.

V6d: 53 seconds
V7: 45 seconds

15% speed improvement. I tried multiple combinations of Dynamic RAM and Threads, no difference.

Pentium 3.2 HT, SATA Raptor, 2GB RAM.