How cool!

If it helps, I like to think of these kids we all discuss as OUR kids, so I get a thrill from the cool things they ALL do.

I'm rooting for every one of them to grow and succeed and be happy and healthy and productive. As Dave Letterman says/used to say, "It's an exhibition, not a competition. Please, no wagering."

Now, as for your particular one of "our" kids...reading a word at 2.5 is pretty doggone early! Oh, yes!
And FYI: practically every one of us with an HG+ child has thought to herself "Well, doing that thing at this time is not that big a deal, right? Pretty normal, I think. S/he's smart, but not more than MG, I think," only to find out later that it's NOT ND AT ALL! It's called GT denial, my friend!
FWIW, I think you have a healthy case.
