I don't think 70 mph is even possible. The question has been discussed at some length on other forums. High 40's is common, a few people I know have hit 50 (if you trust their computers ), apparently the highest speeds on the TdF are in the low 60s (but then, they're winding technical descents, so they wouldn't necessarily be reaching terminal velocity).

Anyway, abbey is a spammer; the forum software is stripping the links out of his/her posts. Ignore away.