This is a question that belongs in the online match making thread.

To answer it, ping is merely a snap shot of you sending data to the server and it sending back to you, once I believe. While you're playing your ping goes up and down constantly, as does the other person's. Whatever speed the game is going on your end, it is going on the other person's else the game will desync and you will notice this when the other person stops attacking mid match because on their end, they've won. Even people who have a low ping in the teens can still experience significant lag due to server issues, amount of people in the room, net traffic in their local area, etc. Stability is often times more of an issue than the actual delay in command input, because I can play with 1/4 second delay as long as it's constant, but most of the time my lag/delay/button loss is random. If I were you I'd just play the game until you get use to netplay and then see where you stand.