ive been making jokes about 'fiber to the desktop' since 1996. funny we still are not quite there are we. so close!
in my experience, the faster the pipe, the less inspection. its a cost thing.. when we were paying 500$/moonth for a 64k pipe (yeah thats right), you bet your ass we're going to sit on people doin illegal/hogging shit. every bit was expensive. when we updated to 1.54mbps t1 things got slightly more lax, but still, usage mattered, hence DPI, packet shaping and the like. when broadband came people just stopped paying attention.