I don't imagine things have changed much in 35 or so years.
Until you're in the driver's seat of an ambulance, as a kid the perception is that a large percentage of medics WILL push the edge of the envelope any chance they get. It doesn't matter if that's the truth or not, that's what gets noticed; not the ambulance quietly and calmly wending its way to the hospital or scene. These are really cool, lit-up boxes running around the streets doing stuff that civilians just don't get to do. Your little kid head interprets this as freedom.
"Give me a piece of THAT action!" gets ingrained in you at an early age. Probably before you understand this responsibility thing. When those lights and sirens start coming your way, what do you perk up and look for? How fast is the guy willing to go? How will he/she handle all those pesky other vehicles in his/her way? The adrenaline rush of watching transfers over into the adrenaline rush of wanting to do.
So for relatively young medics newly entering the field (we're talking the vast majority of Newbies), you could count on, uh, let's just say testosterone-like hormone levels (this applies to female medics as well) determining just how far the person will take advantage of the perceived opportunity to push society's limits.
Being handed the keys to an ambulance is not unlike being brought to the Tree of Knowledge, you know, the one with the snake and the apple?
This field does not attract the sedate and easily regimented. For Goddsakes, no matter how much they are warned away from thinking it, who completely eliminates the romantic, Super-hero image of getting all the tools and freedom they need to actually save lives? And who amongst us is immune from pushing the pedal closer to the metal (literally or figuratively) in the belief that -- especially in THIS case -- every second counts?
So for all the flack the OP is getting, please, don't kid yourselves. Driving motor vehicles fast and furious is part of U.S. culture. Beating the cops at their own game is a National pastime. Just the idea of getting a chance to stretch the rules of the road is an attractor to the field and for all the political correctness that everyone wants to project, it's a part of the reality of EMS and gets acted out often.
Shock and outrage at a simple, typically American question "What have you had that baby up to?" presents a very nice image of professionalism. But I don't think it's realistic. And I completely understand why many are reluctant to fess up to expressing a very human trait; taking it to the limit.
This is coming from your Grandfather who prided himself on 3 a.m. 90 MPH charges from a move-up position at a godforsaken cow-patch into town 18 miles away and did pretty good at cultivating relationships with local LEOs so I'd get away with it.
I don't really buy that we were a different breed in the 1970's. What do you think?