I think the ones that use the forums here are mostly full-time workers/college students who come home after a long day to work on their comic as a hobby and engage in meaningful conversations. But the overall age average of consumer accounts (ones that aren't creators, just readers) on Tapas may be somewhat younger. People on the forums here have been mostly fairly mature and respectful so I'm not surprised at the poll at all. In fact, 22-30 being the most common was just what I expected. Myself included there.
Webtoon on the other hand is definitely has a much younger creator/reader age average lol. Almost feels like it's 12-17 year olds mainly. At least a good sum of the readers.