I spotted some inaccuracies:
There's… …negligible difference between vehicles,
This is incorrect; beating the game on difficulties 1, 3 and 5 release superior updates of the current car, and the speed is noticeably faster in game. Granted, there is barely any difference between any of the four starter cars, but there are huge difference between the upgrades and those starters. You downplay the speed difference later on; the truth is, I'm playing through this currently, and I'm completing races that take under two minutes an average of five to ten seconds faster with the third tier than the second. It's a
very real difference in speed. I'm stoked to test my reflexes with the fourth tier cars even if the graphics are atrocious.
The difficulty of this task can vary considerably due to a tightly wound rubber band connecting the AI controlled vehicles to your rear bumper.
This isn’t true either. Cruis’n USA has no rubber band AI (at least against you); if you can’t pull away from racers, it’s probably because you don’t have a car appropriate for that difficulty setting (or they caught up fair and square). Maybe things are different on difficulty 5 (Update: just beat it. they're not), but it's certainly not true for 1 or 3. My understanding is you're racing against cars that are just as fast/faster until you unlock the next tier; that's not rubber band AI.
The game does have rubber band AI that I've seen; it doesn’t let other racers get too far ahead of you if you do poorly. But I’ve pulled away time and again, especially after accidents bring down the front car or just from having a superior car, and I’ve never had anyone catch up despite crashes near the end unless it seemed plausible. (Update: The game even reports split times so you can measure your lead). You didn't play this enough before passing judgment here; see
Mario Kart 64 for real rubber band AI on the console, not
this.
Playing through the Cruisin' mode will take you through all ten courses consecutively,
There are fourteen courses.