http://www.the16types.info/vbulletin/632148-post20.html
Diana's post here is really good:
Diana:
Te never shuts up. They have to show off every little piece of information they have no matter how little you care about it, and don't even notice if you fall asleep while they're talking, when you wake up again, they'll still be going on. That's really only the extreme Te, very unbalanced ones, regular ones don't do that, because they're tempered with more Fe-awareness.
I once differentiated Te and Ti by calling Te "information collecting" and Ti "information sifting" and that works, even for the balanced well-rounded Te types - they have great stores of knowledge they've collected, and they want to share it, subconsicously looking for Fi-type judging and sorting of the info.