I remember reading a TSB about the torque link mount bolts coming loose. I thought that was for '08's, though. I have also read posts on here about the torque link bushings going bad early. If it was the McPherson strut, it would be aggravated during a turn, I would think, although it would seem like it would also make the noise if you hit bump. In a turn, one shaft would EXTEND, pulling a section of the shaft already lubricated across the seal, in effect, lubricating it. The other side would compress, having the opposite effect. Also, I would have asked him if the fasteners he re-torqued magically became tighter after a few turns, stopping the noise? At any rate, if it only does it for a short time, and only when very cold, I dont think I'd worry too much. Metal, lubricants and rubber seals all interact in different ways when exposed to extreme cold. Now if you hear a loud clunking noise when turning, especially if its up or down a small incline, and it does it ALOT, then worry. A ripped boot on the CV joint can cause serious problems. Like dirt, sand and small pebbles in the CV joint. VERY bad news.