I didn't do a count, but I'm sure I did it at least a dozen times (if not more) on my last trip down the highway (100km) today.
I also hate to admit it, but a fair percentage of those "passes" were essentially two lane passes.
It really ticks me off that I have to drive that way, but a lot of the time the only way to get around the moron sitting in the passing lane is to drop back cross the middle lane, pop into the slow lane, speed up enough to get past the "cautious" driver who is just doing a tick or two under or over the limit (and who wouldn't ever think of driving in the slow lane) in the middle lane, then getting back into the passing lane in front of the boob who wants to lead a parade.
I'd love to stick to the slow inside lane, but with all the on and off ramps and the transport trucks using the lane as they are supposed to, it is only possible to make so much progress before being forced to head into the "faster" lanes.
I'm another driver who tries to drive the gaps. The fewer people around me on the highway, the happier I am, as I don't trust other drivers. (Actually I trust them to be unaware of their surroundings and to pull lane changes without checking their mirrors or signalling their intentions.) Every move I make is done with plenty of space. I don't cut people off. I signal every lane change, but I know that if I'm ever stopped by the cops, I'll be the one charged with "aggressive" driving.
Of course when there are four lanes of traffic and there are transport trucks across three lanes, it is no wonder that drivers get conditioned to sitting in the outside passing lane and doing as they please.
We really are the most undisciplined, inconsiderate drivers compared with Brits or Europeans. We don't even have the "flash to pass" procedure. If you flash somebody here, you are likely to start an incident of road rage.