I don't really see a problem with PG driving, I see a problem with not being ready to clearly and concisely differentiate. How is it different from Evernote and how is it different from Wikipedia should be completely anticipated ready-to-handle followups with great one-sentence answers that focus on the customers.
I really don't like the alternate suggested approach because I'm not willing to grant the premise. Does work get done using team based tools? Work gets done to a shocking degree with email, excel, individual text editors, powerpoint... none of which are really 'team based'. My first thought is to go with something like "We help individuals collaborate by [whatever it is this thing does]" simply because that gets me a frame of reference faster and gets to talking about the interesting part sooner. But I'm still not sure what the interesting part is... so far this sounds more like Google Wave than anything else, and that alone might be enough to pass on backing the idea, under the "will fail because it's too hard to convince people they need this" category.