It didn't so much as pull as get stiffer to turn out of the lane. Again, that doesn't happen if your signals are on, so it's a good reminder to use your signals, too.

Like I said, relying on these assists as replacements for proper driving isn't something I would recommend. You should still be shoulder checking and using your mirrors. My wife's vehicle has blind spot detection, which turns on an amber light by the mirror. If you're changing lanes, it's an obvious indicator that it may not be safe. A more thorough shoulder check can identify if the vehicle is actually at risk for collision. For example, if you just passed a vehicle and are pulling away, the detection light may still be on, but you aren't at risk of collision. Alternatively, if I thought the lane was clear and decide to change lanes, the light may be on due to a speeding driver who is approaching to pass me in the adjacent lane. The light will be on even though he isn't in the way yet, and changing lanes could result in an accident. Or maybe someone has been sitting in your blind spot for a few minutes and you decide to change lanes. A quick mirror check indicates you're safe, but that amber light says maybe not. If your shoulder check doesn't catch the problem, you probably haven't done it well enough.

Again, can be good assistance tools, I don't think they're good enough to be replacements yet.

I have a Toyota with lane assist and it doesn't. The "lane assist" is part of cruise control. It's off by default.

I love it because it removes a little of the mental load giving me more time to scan the road for potential problems.

Off by default should be the default.