I think the guy is hinting that you are a "Unicorn" too-good-to-be-true type of guy. Raw intelligence at the IBM research is exceedingly rare. Raw athleticism

I think the guy is hinting that you are a "Unicorn" too-good-to-be-true type of guy. Raw intelligence at the IBM research is exceedingly rare. Raw athleticism to the point of professional tennis is exceedingly rare. The work ethic and dedication to accomplish either is exceedingly rare. You're a genuinely accomplished person who has lived up to your potential in two disparate fields. This is so rare.