In article ,
lid says...

Many thanks, Jeff, that does seem authoritative.

So, this sounds like a very high fidelity test.

Yep, largely so. But it seems they intend to shut down the first-stage
engines at the time of the abort, so the booster will not try to catch
up with the capsule after the capsule separates. Still, I guess the
capsule's acceleration would win anyway.

Engine shutdown is part of the abort sequence, so it's still very much
like an actual abort would be. I'm sure someone at SpaceX and/or NASA
has done an analysis on whether or not the engines could keep firing
despite the abort. I'd think such a thing would be designed into the
system such that the engines would shut down in case of loss of
communications with the engine controller and flight computer.

Jeff
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