There is so much confusion here, and I think Intel are specifically trying to do this! "Thunderbolt USB" my arse. USB is a standard - they should not be allowed to misappropriate it in that way (even if Thunderbolt can carry USB signals over it).
I for one haven't used Intel chippery in years, so no way I could have Thunderbolt, but I have plenty of USB ports that are all fine.
Also - the letters in USB are for the end connecters and the nubers are for the generation - so we are acutally talking about USB 3 compatibility (i.e. the newest and fastest) with USB C cables (i.e. the new multi-directional connectors).
Just my 2 pennies worth
Biting the hand that feeds IT
