Careful study of this in my twighlignt years of flying (now retired but active in th sim) revealed that, as CS says above, there is no way the ADIRSs can work out the S/W between 100kts and getting airborne. All you get is a head or tail component which is influenced by 'drifting' left or right of the C/L.
The subject is further confused by th fact that the Thomson/Thales/L3 sim that I sometimes use does display the S/W while still on the RW while the CAE sims only display the head/tail component.
Careful monitoring of the ND wind indication during asymm flying will reveal all sorts of 'strange' winds brought about by unbalanced flight which the IRSs see as drift.
I hope this helps.
mcdhu