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That also hurts the TT CA, now that I think about it

Probably, but CA isnt so tech dependable as many can claim - it can for leave TT and count on normal 15% terra while raising eco or hab - standart HG setting CA can ba also monster, no matter if AccBBs or not will be checked. Insta terra is to good to not be handicaped - slow tech only force CA to either change race settings or style of play. AR cannot handle slow tech properly in any game - for them handicap is to high as they cannot create resources fast enough to keep with the rest and cannot modify race to minimise that handicap.
I hope that you see the difference?