Got the new 04/blue/5sp/ac yesterday (#543). Of course, had to take a drive. I noticed right off that the steering is responsive - too responsive.
At freeway speeds on straight, level, wide roads. I have to continuously 'jiggle' the wheel to keep it inbetween the white lines. It seems to have incremental adjustments rather than smooth moves. I move the steering wheel just a fraction to the right and it seems to take 2 or 3 degrees. This means than within a second I have to nudge it gently to the left which the car then starts drifting for the left white line. Over a few hundred miles this takes up a LOT of attention. I can only imagine what this would be like at 90mph.
I expected it to be more 'sporty' than a Civic/Accord but this is a bit too much. It can not be left 'unattended' for a second, and it does not favor any side. I've had sports cars (and a CRX) for years. This was not expected. If you plot my progress down the road from above it would be a zigzag.
My Insight when properly aligned and not being influenced by side winds or ruts will hold a straight line for over a mile. I find ruts can be disconcerting but they rarely go off the road, so they're not dangerous IMO.