Actually, I've seen no FoxPro DOS speed issues. I've been running on a dual processor 2.0gHz (4 gHz?) system for a year now, under both NT 4.0 SP6a and XP PRO. If the FPD app is configured right and doesn't try to directly access the hardware - everything seems to work fine (and quick!).
Rick
P.S. I think Dave assumed FoxPro for Windows based on the Divide by Zero comment - DOS doesn't have this problem.