I don't agree. Users understand a browser, and that it contains tabs. I'm sure people will get used to the new way, probably, but it's not something that was in need of innovation. It was well understood.
The new behavior is surprising to people who have used any phone browser before, and it will continue to be surprising to people who use their desktop browsers as a point of reference.
Most casual users (family, non-tech saavy people) that I've seen don't even use the task switch button. They go to the home screen and then open whatever app they want, even if it ought to be in the task list already most of the time.
