The Grand National and GNX was more of an Street car ,And the Monte Carlo SS and the other G bodies got more from racing in NASCAR ,The Malibu a drag racer ,Being one of last full frame cars.
I think you need to bone up on your G-body history.
Brian,
I feel compelled to respond to this. I'm not surprised you were underwhelmed in 2000. I think if you had ridden in the car 8-10 years earlier then you would have been more impressed. Like many on here, I grew up in the era of gutless cars. When I started driving, Dad had an 84 F150 (gutless), his 62 Ford Galaxie (no where near running) and a 63 Ford Galaxie survivor. The 63 had a 352 with a 2-barrel and single exhaust. It was rated at 220 HP. The car felt really good compared to anything else I had driven or ridden in.
Fast forward a few years, circa 1993. I'm driving an 84 S10 Blazer with a 2.8 V-6 and a 5 speed (gutless, but seemed 'sporty' with the stick at the time). My step-dad is driving the hand-me-down family car, an 84 Buick Century with a carbed 2.8 V-6 with an automatic overdrive (even worse than gutless). Dad is driving an 88 Suburban with a 6.2 diesel. Gutless but economical. Mom had a 91 Pontiac Sunbird with the 3.1 V-6. That car felt pretty good. This was the beginning for me of the feeling that cars were coming back. Most of my friends have hand-me-down throw away import cars (those few lucky enough or hard-working enough to have a car). They were all gutless. This is when I first rode in a Grand National. It was an 86-87 because it was a cold air car. I've never been enthusiastic about a V-6. I'm just a V-8 guy. Still, that car really impressed me. I was really surprised at how it ran, especially considering it was 6 or 7 years old by then. I was a little too young when the cold air cars were new to really 'get it' and nobody we knew had one. Riding in Charlie's put them on the radar for me. Would I have been as impressed with Charlie's car if I was comparing it to an LS1 F-body in 2000? I don't think so.
I don't think I would ever buy a GN or a T-Type because I wouldn't really want the V-6 (not knocking it, just not my cup of tea), but I still think they are cool cars and I still think it is impressive how well they ran for the time. I still marvel at the fact that those cars somehow got built in that dark era of American cars.
As someone who owned a 355 powered MCSS and a worked over Turbo Buick (both 12 second cars), and regularly drove a six speed LS1 Camaro in 2002... I can say experience and perspective is everything. Stock the Monte and the Buick were lumps, the Camaro not so much. That Camaro today is a lump without mods.