plek is overrated anyway. On a new fender with the green wood they use, the neck's going to move anyway so a plek doesn't make much sense to me. Plek would make more sense on an old stable neck or graphite. Do people not realize that wood moves ALL the time?
I had a 1997 Heritage Sweet 16 PLEKKED by Joe Glaser in Nashville. Since the guitar was a little older and had some fret wear, the results were outstanding. The frets were polished and smooth and the difference was noticeable. It plays better than it ever did, there was enough material on the frets so I didn't have to get them replaced. Yes the wood moves with the seasons, but I've never had to do anything but minor truss rod adjustments to bring it back to perfect. It's 2 years into the PLEK job and I'm getting ready to have it done again. To me that's a very good deal...getting two years out of that setup. This time I will probably have it refretted, but that's just because of normal wear.
To the OP: I'd imagine that with the volume that Fender produces, they might only use it for CS instruments.