Ehhh, no one's getting pwned because the argument has been thoroughly explored by so many people. That's why I boiled it down to biology vs. cooking. Neither is wrong but I'm more interested in the cooks.
Incidentally, cucumbers are also fruit, by the same biological terms. See why they use different criteria in cooking? I think squash plants like cucumbers and pumpkins are also more nutritionally similar to vegetables.
Watch Wolfgang Puck. I win.
Not if I don't feel like watching it.