yeah I guess you do get used to the delays, although I think they often are at an imperceptible level. With my new CPU I rarely experience any lag, although some minor hiccup might present itself here or there (never usually enough to disrupt a play, or game in general). But, I suppose if you are used to playing on the console you would notice the differences more. Although, I do occasionally play the CPU and don't notice any difference between online and "console" play.
I'm sure you've noted this, but one misnomer about TSB III online is the so-called "B Button" delay, or worse named "B Button Glitch". This is often attributed to lag, where the pressing of the button is not properly in synch with the registration. However, this is not true: the delay that occurs when attempting to throw the ball is built into the game itself. It's always been there. Ever since I played TSB III for the first time it has been present. Worse QBs (I've chalked it up to COOLNESS), will not always release the ball when you hit B, even a second, or third time, especially under duress. While this can be an annoyance during the game, I really love this added element to the game. Yet another attribute to distinguish player capabilities.
BTW: used the TLL78 Niners, 3 min Qs, and ended up 13-3, losing to Dallas in the divisional playoffs 17-7. Had a chance to tie or take the lead early in the 4th Q, but with a guy wide open in the EZ, Scott "Bald" Bull threw a pass from 5 yards out that ended up being intercepted when a speedy Bennie Barnes came out of nowhere to pick it off. Dallas would then go down and score to make it 17-7. Bull had one last chance to make it respectable; instead he lofted a high arcing ball that went 25 yards past the intended receiver and was picked yet again in the EZ. Given that I had a lot of trouble against the CPU in quite a few games, it is not a good omen for the TLL78 Niners against MAN opponents.