here in California that would be taken as the signal to stage a little deeper, wind up your engine and prepare to pop the clutch
The same in some places here! I've never seen the point of having the R+Y phase, as it just encourages some people to go forward before green. It seems our nearest neighbors don't see any need for it either, as neither Ireland nor France have it.
It's inconsistent as well, because at lights where there's a green arrow filter for turns (while still red for other directions), the green arrow just pops on without any amber first. By the way, we don't have the flashing-red aspect here either, nor do we have turns on red.