That sounds consistent with what is being seen elsewhere - an optimistic increase in applications based on “test optional”, but likely the same students accepted. At least the same number.
It’s a good sign that the salutatorian at our HS, who finished second to my D each year in AMC, with an otherwise very similar profile, but not 4 parent/grandparent CT/CMU degrees, just started at SCS.
I see they are publishing the number of “first choice” applicants - presumably ED. I wonder how many of those are RD to ED2 conversions, two weeks after MIT EA results come out. My D may face that choice.