Nothing against your athleticism but PP probably, most undoubtedly, has a greater set of the correct muscle groups that fire quicker than yours. ...
There's no doubt I will hit 450 feet at some point within the next year or two. My goal is to hit 400 feet before snow flies this year. I think I will get there, I'm only 25 feet from that with my max distance now.
Point taken, it is possible that PP can out muscle me in specific ways that really count for a disc golf throw, but I doubt that that is the primary difference between her throw and mine. But I guess neither of us can prove the other wrong on that point so we'll just have to wait and see if you hit your 450 foot goal within the year. If you do, I'll eat my words, but until then it might be prudent to not carry yourself with more certainty than you've earned on the field, and i'm not sure what you have to prove by speaking like an authority on something you haven't yet accomplished.
For what it's worth, I used to have pretty much the exact same mindset as you when it came to the throw. I managed to incrementally improve from 340 ft up to about 25 feet short of 400 by just going out and working on timing and snap and honing those muscles and trying to rotate as fast as I could. But I've been stuck at that same level for years now, and was forced to recognize that I might have some fundamental misconceptions about the throw, despite how "right" they felt.
Best of luck to you, enjoy your time on the field!