This topic is red-hot at my company right now.
Here's what I think: when glass/FMS/two-man cockpits were introduced in the 1990's here, all the pilots were coming over from rope-start aircraft. They had the requisite skills, airmanship and situational awareness to fly analog already, so the glass training was just to learn the new capabilities.
Now, we've got guys/gals coming up that have never flown round dials - they went from RJ's to the 757 to the 777. Not a bad way to come up, but it does require a little more emphasis on basic airmanship that was not previously required.