It's possible but my writing looks the same as it did in grade school. I can't think of anyone I know whose writing changed that drastically.
It does seem a tad peculiar.
Has anybody done a blow up of that box checked by the attendant below her signature? It looks from first glance as if something may have been checked in the “other” box in her signature, and then smudged over after with the MD check below- it’s hard to tell with the naked eye.
If you compared my signature when I was a young adult to severe carpal tunnel to after carpal tunnel repair, you would think I was 3 different people.