I may be wrong here but my understanding whilst learning was that the x-wind limit (on C152 anyway) was what the A/C could take without removing the drift
Sliding Member - where did you hear this? I've never heard anything like that before, and I can't believe it could be even close to being true. For a start, in any light tail-wheel aircraft, the limit of what the A/C can take without removing the drift is zero - any more than that, and you'll groundloop. Besides which, if what you say were the case, there would then be no indication of how much crosswind the aircraft could actually take - which has to be a key factor in decided whether to fly or not.
The maximum demonstrated crosswind is exactly what its name implies: it's the maximum crosswind which has been demonstrated as being possible to handle safely.
FFF
------------