the autobrakes don't 'know' there's a crosswind, equal pressure will be applied on both sides.
True if the weight was the same on both sets of wheels.
In a crosswind, (with no aileron applied) the into wind wing generates a bit more lift than the downwind wing and more weight is transferred to the downwind wheels. The upwind wheels may have the brake pressure modulated to avoid tyre slip and the down wind wheels do most of the work.
If blogs unwittingly uses aileron to help "steer" the aircraft then the effect is even more pronounced.
See page 10 of
http://www.airbus.com/fileadmin/medi...LAND-SEQ05.pdf