When you ask someone about an irrelevant detail related to their status in the community while you are discussing something unrelated, it implies (quite strongly) that you are trying to change the topic from what is at hand to a comparison of credentials, and it also implies that you believe your credentials to be better in some way, somehow giving you an upper hand.
If you are truly independently curious about their startup, ask them separately.
But you were not (you admitted as much). So it's distasteful.