The game does regularly run at less than 30fps on X360, so it wouldn't be much of a stretch to assume it runs around there on X1, which, by all accounts, seems pretty close to the same performance, if not a bit worse, currently. I hope they chose ME1 in the initial batch of titles because it was one of the first UE3 titles on X360 and any tweaks made to the emulator/interpreter benefit all subsequent UE3 titles as they'll only become more demanding while performing better in terms of framerate.