No, but you had to push the nose down somewhat to keep the 365kts IAS that we descended at. With just 1&3 in reverse and 2 at 11000, the HS121 would go down at > 12,000 fpm - even at 280 kts. Wind the speed up to 365 and close 2 and anything was possible.
Glueball:
If you don't know what a Gripper is, how would you know what the procedures were? I can't see what difference IAS would have on a cracked windscreen, it would be all down to cabin diff.