Is ping that relevant if i play solo?

Ive noticed the game is always giving me 300ms on EU servers, although in all other online games i usually have a stable 60ms, 30ms for a select few (EU servers as well, only servers i can play on).

Now, before i hastily uninstall, i figure i should ask if i can solo the game, coz although it says 300ms i dont notice any delays in gameplay whatsoever...