Yes. I am a single founder. I have a mentor who is advising me and the "we" is because I'm practicing to sound like a big company when I talk to enterprise customers. They don't like hearing "I". I'm also working on growing the team and getting additional people to join me.
It's probably your first reaction to try and sound like a big company, but personally I'd would avoid that if I could. Especially if it comes off unnaturally (which it appears to have done at least in this instance). In some cases you can play your small size as an advantage, at least for your first customers. Just as a single example, a small company can offer much more personalized customer service. For more about this, see the "Delight" section of pg's most recent essay: http://paulgraham.com/ds.html
