I had 3 different macbooks, macbook 13, macbook 13 retina and now I have macbook 15 retina. When I bought macbook 13 retina I've noticed that keyboard and touchpad differs a little from what I had earlier: keys and touchpad pressings became quieter and shorter, but on retina 15 I have the same keyboard and touchpad as on the first one. Is this normal? I've bought it from resellers and wonder if there any trick from their side. Thank you!