Road Cycling“It is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle.” -- Ernest Hemingway
Not sure about 105, but on Ultegra the dead travel is adjustable to suit your hands.
I have had Ultegra shifters with free-stroke adjustment and 105 shifters without the adjustment. I found that the free stroke adjustment was very subtle. So subtle in fact that I could not really tell the difference between the screw all the way in and all the way out. If the brake lever has excessively long stroke before the pads bite, it is a bleed issue, not a lever issue.....according to my experience.