"This new format takes some getting used to....."
I think it is worse than you imply...but the following is only my opinion, not some scientific study.
I think that W8 tiles, though modern looking, do not match what the human mind sees as instinctly "organized" and "easily grasped". Hence, the learning curve is going to put people off...again. For corporate users, that can be a killer.
People for at least about 10,000 years have put ideas/character...