I'm certainly guilty of "speaking techie" at times, even though I try not to.
The hardest part of not doing it is that I don't mind if other people speak in the jargon of their profession, since I'm always interested in learning more about anything, and I'd love to know wtf they're talking about.
The real trick is gauging your audience. I think that's where perhaps some techies (and some subset of any profession) fall down. If you assume the person knows too little about tech then you can come off condescending, if you assume they know too much then you go right over their heads.
Actually it's no different than any conversation on any topic you might have with someone, it's just that in tech the jargon can tend to get thick fast.
The hardest part of not doing it is that I don't mind if other people speak in the jargon of their profession, since I'm always interested in learning more about anything, and I'd love to know wtf they're talking about.
Most people don't think like that, sadly.