I've noticed a few comments at other places on the internet about "Electric services from May", so it might be timely to point out that we are now twelve weeks away from the timetable change and currently the new timetable is pretty much exactly the same as the old one.
So, while we can expect to have electric trains soon (My guess is March for Liverpool to Manchester Airport, April/May for Manchester Victoria, and Wigan at the same time or soon after.), they are probably going to be gradually phased in, running in diesel timings for a good few months, perhaps until December.
Of course, all this is guesswork. I am not privy to the internal planning processes of the railway, and a new electric timetable could appear at any moment to prove me wrong, but I doubt it.