I agree with your sentiment, but on the other hand, what's the big deal to put your best foot forward when a VIP is visiting?
When I was in a small, casual start-up, they asked us to dress nicely for just one day to impress some visiting investors. None of us had a problem with it; we all had a stake in the company's continued health. It seemed like the natural thing to do, and I'd do it again if needed.
I've done that too, in the same situation. But I think it may backfire. Some investors may be nostalgic for their days in a startup. Others are still looking for that "startup edge" which differentiates from stagnant corporations.
If your clothing says "corporate", you may send the wrong message and drain some interest.
When I was in a small, casual start-up, they asked us to dress nicely for just one day to impress some visiting investors. None of us had a problem with it; we all had a stake in the company's continued health. It seemed like the natural thing to do, and I'd do it again if needed.