Hi, as you can read from my signature I had full face threading routinely for about eight years.
I'm male with thick, black hair growth (I can hear you say "ouch!")
From my experience, I would say the thickness of the hair stayed about the same when I had this treatment.
The reason why I stuck with this treatment for so long is the wonderfully smooth, baby soft results I got from almost every session. It only lasted 4-5 days though, and then I had to allow a few days regrowth before it was time to remove it again...
I'm only a consumer, not an expert, but I would have thought that your hair growth would make you an ideal candidate for laser treatment,it has worked superbly for me.
I have had around 20-30 hours of electrolysis on the face, and these days would use it as a supplement to 'mop up' hairs missed by the laser. Personally I found having electro as my only treatment for hair removal a S-L-O-W process.
Male [Straight], 36, Asian/European, Typical Hair Growth/Colour: Coarse, Thick/Black; Fitzpatrick Type IV
Circa 1997 - September 2012: Full Body Wax once a month (approx 180 times)
Circa 1999 - September 2007: Full Face Threading [upper/lower lip, cheeks, neck] once every 7-10 days (approx 330 times)
Currently: Laser Hair Removal (face), IPL [CACI] (body), wax (buttocks/bikini line/nasal/earlobes), threading (eyebrows)