Nick, my own experience is that there is reciprocity, and if it's a moving violation, you will get points.
Depending on your insurance company, they may never find out...some are much more aggressive about that kind of stuff...I've been with my carrier for over 20 years...they just collect the premium checks, and have never once said anything about the occasional ticket I get. If they DO find out about it, it'll probably cost you in terms of rates, so be advised. Once again, though, one ticket *might* not make a difference...each company handles that differently. Each year you drive without a ticket awards you a "safe" point; they cancel out the "bad" points from moving violations.
How much over were you? In VA, the least amount of points you can get is 3...10-19 over is 4 points...wreckless, which USUALLY comes from 20 or more over, is 6 points, and a whole world of hurt in terms of court appearances etc. You CAN get a 20+ over ticket that's not wreckless, but it's rare. I got one in W.VA that was written as simple speeding, but the state of VA called it wreckless...which caused me some considrable aggro.
A 3 pointer is not a whole lot to worry about. But, if there ever comes a time, DO NOT ignore your invitation to a personal interview under any circumstances. BAD stuff will be the result of that....the Commonwealth will remind you that driving is a "privilage", not a right, and you'll be hoofing it for a while hehehe. Ask me how I know!
The speedometer calibration trick has worked for years....most jurisdictions will give you the benefit of the doubt on that one...I guess they figure if you're willing to go to all that trouble, they'll reward you.
I had a friend that worked at a gas station...he had a whole book of those forms...he'd just ask you how much you wanted to be under, and write it up. Of coure, he did accept donations of a certain malt beverage for his troubles