Regarding the stratty neck: Now, I didn't use the stock pickups long enough to really get a feel for how stratty they we're, but the bg52 neck certainly doesn't sound like a strat neck to me. I have a 63 veneer board strat set and the neck tones are worlds apart. The bg52 neck is a lot dryer, less high-treble and a kind of midrange that really barks when driven. If anything, I would compare the neck to a p90, with the same pretty raw texture, albeit with lower output. I use them for a lot of strat stuff, true, but that's just because they are so versatile. If I could only keep one guitar with one set of pickups, this would be it, they can handle most of the stuff I throw at them, except maybe for detuned grind.
Regarding whether they sound authentic or not, I'm no expert in vintage teles, but if I understand the timeline of tonal changes correctly, teles went from being hot and dark, to less hot and brighter, to not hot at all and very bright. In that case, these would be of the less hot and brighter variety, ie early 50's.