Google Apps or collaboration in general
It's hard to make a judgement from this poll, unless you have something to compare it with. For example, if you asked people in corporations that have SharePoint whether they ever used the collaboration tools, what would the answer be? My guess is that it would be lower than this, not because SharePoint is bad, but because it is not as easy to initiate collaboration (especially with extenal users) and many people's job roles simply don't require collaboration.
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