Hi guys,
and other guys from Epic Games run high-end-specs machines that’s why you don’t even notice how shaders compile (actually they are - you can notice how the yellow text in the upper left corner of the Material Editor window disappears for a second-two when Zak plays with the material, and that is for the shaders compilation).
I have a middle-specs laptop and that is not taking a long for compiling shaders. I run an engine compiled from the latest sources (master branch), so probably I have less bugs. You can also try to update your video card drivers if you haven’t done it yet.