Here in the UK people just have "Smartphones" and "tablets" (tho I do hear people calling generic tablets "iPad" sometimes).
The USA, love it or hate it, is the most dominant marketing force on planet earth.
Edit: How about Google? They copied Yahoo and AltaVista, and their search engine has become so ubiquitous with searching that it's a word in the dictionary now.
https://en.wikipedia.org/wiki/List_of_generic_and_genericize...
Some of the category names don't even match up - adhesive tape is definitely not what comes to mind for Durex for me.
Consider: thermos, escalator, linoleum, trampoline, zipper, scotch (as in tape), jeep, xerox, jacuzzi, dictaphone...
I think branding to generic really depends on linguistics of target market, brand writers and brand saturation in target market.
A brand name that is hard to pronounce is less likely to be used and how often do you think about the Slovakian pronunciation of your brand?
The US being a large linguistically similar market would be more susceptible to this.