Supercruise,
There isn't really such a thing as just a 'crabbed' approach
I would disagree with that.
A crabbed approach involves entering the flare with crab, then just before the wheels touch down kicking it straight with rudder - sorry, "promptly & smoothly starighten with rudder as not to over do it"
As the rudder is applied, a little oposite aileron is required to keep the wings level, in order to counteract the secondary effect of the rudder. The landing is made with wings level, both main wheels together, before the aircraft has a chance to start drifting. (Obviously a very light aircraft would start drifting very soon after straightening up, which makes this technique very difficult on some very light aircraft.)
The key here is that the landing is made wings level.
If the rudder is applied too soon (either deliberately or due to a slight lack of judgement, makes no difference), the aircraft will start drifting if it is not corrected. The correction which is made is to apply more into-wind aileron to lower the into-wind wing. As the aileron is applied, more rudder is required to avoid the yaw which occurs as a secondary effect of the rudder. The landing is now made with the into-wind wheel first, followed by the other main wheel, followed by the nose wheel. This is the Combination technique, and it is slightly different from the crab technique in that the landing itself happens with one wing low.
However, I think lots of people use the phrase "crab technique" to refer to this one, probably because they have never seen a properly executed crab technique and therefore don't appreciate the difference. This was certainly the case with me, until I did my FIC. In around a 25kt cross-wind in a PA28 my instructor demonstrated a crab technique properly - it was a work of art, and not something I've ever been able to replicate since.
FFF
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