None of the links i read showed this, they just stated what you have already told us.
Check out how tall mt everist is (not sure of the spelling)

What your realy saying is that the plants will grow more TCH on them with the more UVb they come into contact with. because no matter how much UVb light there with with the higher u go in altitud, the less healther the plants will be (within reason) and so the less THC they will produce. Other factors come into play with increased alltitude you know .

ps. Hey jude is sooo much more trippyer then i thought it was :rasta: