They were clunky buttons, and yes it does mean something:
http://dictionary.reference.com/browse/clunky?s=t
awkwardly heavy or clumsy: clunky metal jewelry; clunky shoes.
They were huge and had to move mechanical parts around in the item so you had to put force in them and make sure you got the appropriate clicking sounds. Pretty much the definition of clunky. It’s not bigotry, it’s admitting reality.
Mechanical switches work when you have gloves on. Touch screens do not. Just to make a point that old != bad.
"Old-Fashioned" and "New-Fangled" are equally idiotic responses to technological change.
And "clunky" is just a meaningless insult. The author should be honest, and say "I don't like it".