The comment above reached a figure of 700 per day per person. For my teen self, that's about two or three hours of conversation per day. It's certainly sustainable for months. Hell, I was known as the outlier in my teen circles because I liked to send longer messages (actually combining full sentences into one message) from time to time.
r3bl is correct. In the context of incredulity over someone sending 700 texts per day, my point was that I’m sure there are many users who send over 700 texts in a single an hour.
Nowhere did I say that rate would be sustained for 24 consecutive hours.
It is the ultimate in moving goalposts to take my response to a claim of 700/day being insane, to recast the debate as if it were over sending 17,000 texts per day.
Pew's 2012 estimate, the most recent available, is 167 mean, 60 median, texts/day for teens. Fewer than 20% send more than 200 texts/day. Again, the likelihood that "many" exceed 700/day, let alone 700/hr, absent some bulk multicasting method, is unsupported by plausibility or data.
Average character count per text is probably low. Median character count could be something like 3.
That’s all rank speculation on my part. Would be interesting to see actual data on this though!