There is, I have psoriasis under three of my fingernails and it can be painful some days. That combined with limited feeling because my hands were burned badly when I was young. Doesn't have any affect on touch screen usage though. They work fine on iPhones, my touch screen computer, every car with touch screens I have been in, the Wawa touch screen menu, etc.
Galaxys just have shit quality screens. Even the glass scratches easily. I don't even have a protector on my iPhone and considering the daily abuse it gets, the screen is like brand new.