User blog comment:Rupert Giles/Layout Changes: Breakpoints and Typography/@comment-3225604-20150520130959/@comment-24416108-20150520160633

"We generally count smartphones and tablets+desktops separately (since they get different skins). The stats towards the end of the blog post above are only for devices that see the full skin - not the mobile skin."

Instead of changing the Desktop skin which is intended for desktops, why don't you try and improve the mobile skin for the tablet users - or even create a 3rd skin in-between? This could allow you to give them the experience they deserve without ruining the day of all the desktop users.