Comment 100,000 is a small dent (Score 2, Informative) 266
NPR talked a bit about this last night, and Microsoft Office has a 350M user base, so Google's 100k of converts is just 0.03%. There are always a portion of any company's customers that are dissatisfied and will try something else; Google just cherry picked the easy ones and the rest are not going to come that easy.
