Man OP, that sounds like one helluva extreme. But as someone else said, there's the other extreme of talking TOO much. tl;dr example While I was, shamefully, grinding in a Korean MMORPG for a half-hour or so I was in a specific area: this (assumed) guy was talking to a(n assumed) gal about Final Fantasy VIII.
Well, not JUST Final Fantasy VIII, the ending of Final Fantasy VIII.
I couldn't even PHATHOM that there'd be that much to say. Let alone explain it to someone for that long. I was bored 3 minutes in, and remember, I'm grinding in an MMO. I had nothing else better to look at.
It was like a train wreck in slow motion. Very few words were exchanged, it was more like a class lecture. Iunno, maybe the gal was impressed?
I'm personally atrocious when it comes to conversing online, and I think it's because of my lack of experience with online chatting in general. Plus, I type near-exactly how I speak. Makes for good typing patterns, makes for terrible conversation material since it becomes reading material with none of the appropriate emphasis, sarcasms, hand-gestures, and so on.
I personally DO get quieter in general, and more around gals, in an online presence. A lack of confidence in my weak spot that I can't overcome(?). Adding in that if I feel like I'm boring a gal I'll take my leave (much easier to tell in a face-to-face premise), and I shy away from conversation more. So I cut the people OP is lighting up a liiiittle slack. At least when I talk, I chop it up!
Bust out the reading glasses and symphonic music!