You mean from 2h15m to 1h40m (the actual estimates)? It really wouldn't. As someone who actually does that commute - getting up for a 6:00am train isn't much different to getting up for a 6:35am train.
What I would care about, is the price drop associated with the capacity increase/reduced stress on the existing main line. Not sure if speed factors into that.
What I would care about, is the price drop associated with the capacity increase/reduced stress on the existing main line. Not sure if speed factors into that.