Recently read from an article ( a Finnish one, sorry...), that for many MC riders it's more difficult to steer away from an object on the road using counter steering when riding straight than it is when already cornering.
This is based on some study, but the simple reasoning behind this is, that when cornering, you already actively use counter steering. When riding straight and suddenly seeing an object on the road, you easily try something else than fast counter steering.
I tried this myself - a man hole cover as a target in a straight, empty road. Yep, quilty, it felt strange to actively "push" the right bar forward to make a sudden move to the right in a straight road.
Since that, I've made a habbit of going round man hole covers with exaccerated counter steering moves, traffic permitting. You'll never know when it's a squirrel (or something) and the scoot needs to change direction fast.