I don't know enough about the others, but point number 5 is too early to say I think. Windows phones have been decent for how long now, half a year or a year? After having a reputation of sub-sub-zero?

Those at school who have one are very positive about it now, so the market share in this may still grow a lot. I would not think for two seconds about Windows on my phone a few years ago, but I would consider a Windows phone right now because they got so much better.