I did miss it.... and already acknowledged that. My question is I wonder how much faster he was going than the cop car he was following?
I'm not sure 'following' is the right word. What usually happens is you're driving along at the speed limit and you see some clown come screaming up behind you. Since people are normally reluctant to speed while they're in the vicinity of a cop car, the first thing you wonder is whether the guy's drunk, fleeing frome something, or just stupid. You pull over, let him go by, then pull in behind him and clock him. That's what you witnessed at the beginning of the tape. There's another version of that routine, which involves exiting at an off ramp, letting the guy go buy, then getting right back on again. They're both time-proven techniques.
"Following" would imply that the guy was just doing what the cop was doing and the cop set him up. I suppose at some point in the history of man that's happened, but it's pretty unusual.