Ping is the time in mili-seconds(1/1000th) it takes info to go to its destination and back(I think). I am on a local dial-up ISP. Local call to the ISP server and then to fiber. Goes to ATL,GA and then to (is it?) Omaha where it gets headed to where its going. 188-200 mSeconds to HTC. $21 a month.
I used to use an AOL partner($10 a month) and had to call local long distance to the next town over(had a calling plan). Then to ATL, Omaha, Long Island NY, through several routers within AOL, back to Omaha, then for some reason it may go to San Diago or Chicaco, then back to Omaha before it headed in the right direction(TX). 650 to 800 mSeconds or maybe not at all.
600 mili-seconds is playable. Have heard of players that do well with less. Mostly from across the Pond.
But at more than half a second plus some time to proccess and reaction time on your part, it may give a bogie the time he needs to slip from your sights.
Couldn't tell you what's good from Alaska, but you might want to explore your posibilities. I know the half second I cut from the loop helped me greatly.