I know ABS rocks in all types of conditions, but mainly rainy conditions. So if you're not riding in rain... I hear dry payment stopping with ABS can be longer than non ABS.
It's better in rain or dirt or painted lines or steel plates or . . .
Yes a rider that practices emergency stops on a regular basis can brake faster without ABS on good pavement, however 99% of riders will likely stop faster with ABS.
I can't see your wife whose been riding for a few months and put a few thousand km's on a TW200 outbraking the computer any time soon (nothing against your wife or her abilities, she just doesn't have the seat time in yet to have perfected threshold braking on a bike (assuming she even tries, most people don't)).