That's really interesting to know. Especially the bit about games not supporting NTSC that often. In the UK a lot of our games had a 100px black space at the bottom of the screen, with the excuse from the developers always being that the game was developed for the US NTSC market, when ported to PAL for the UK market the PAL image was obviously 100 pixels larger vertically, so without the time needed to remake the graphics for the higher res, they instead used the same ones and just squashed them up on the screen with the extra space left blank. This was the case for quite a percentage of games released, and I never got why they didn't just find a way that could stretch the original graphics to fit. Once I had a 1084 monitor I tended to run the Amiga in NTSC mode for those games so they filled the screen.

Also you mentioned games running too fast. By contract magazine game reviews in the UK used to make the excuse that a game felt slow because it was codes for the faster 60Hz US NTSC market, and after porting to the PAL 50Hz UK market it obviously slowed it down from 30FPS to 25FPS, or 60FPS to 30FPS. We always had that excuse with Beat em ups like Street Fighter. But from what you have said, the US market suffered from the opposite just as much. Just shows you can't believe everything you read!