No, not exactly. ENFPs, when you meet them socially, tend to be bright and flighty and silly and whatever. There's no Te there. But when they're working, or studying, or doing something that requires them to settle down and be serious, then it's Te that we tend to slip into. Neither Ne nor Fi are very grounding, so we need something else to hold us down.
So I wouldn't exactly say 'heavy' Te use, and obviously it depends on the individual, whether they've developed it enough, but we do slip in and out of using Te when the occasion warrants it, for example explaining a problem to somebody, or seriously debating a point, or just trying to get some work done.
I suppose it's possible that someone who only knew an ENFP when they were hard at work and very focused, might mistake them for a TJ, but to be honest, it's difficult to stay in a Te mode for much longer than nessecary.
For example, we tend to procrastinate and waste time and so on and so forth (*coughlikemerightnowcough*) until down to the very last moments. And then, due to sheer pressure, we 'click' into an intensely concentrated, very focused and very productive mode. I've worked at least 12 hours straight without much more than a 10-minute break for food before. Of course, I need to spend the next few days recovering, but still. It can be intense when Te is turned on properly.
Te is what grounds us. Without well-developed Te, an ENFP can be flightier (and because of the N, spacier) than an ESFP, but when we've got that covered, it restrains us a little. And we can be sensible when the occasion calls for it.