Not sure why you think it is faster for those removing conditions from a GC obtained through a fiancee visa. Like I said, we fully expect to wait two years for ours, as that is how long it takes to process I-751s in Nebraska, regardless of the original visa type.
Oh, and it's a good thing you didn't bring her over on a B visa to adjust status - that is FRAUD, and precisely why people are denied B visas.