I have been playing Dota 2 some time now and i noticed that some people at start of the game type -ping command that in Dota 2 don't work.
-ping command have been added to the game.
To check ping type -ping in chat box
"-ping" vs "net_graph"
Main difference between this two is size, net_graph takes huge space but -ping in showed only for 2 seconds and you need to type it every time you want to see ping.
For people with bad internet connection like me i want to know my ping all the time.
net_graph can be customized.
WC3 Game Filter is a tool that will filter available games in Battle.net.
This way you will easier find maps that you are looking for. This is a great tool if you are looking to play other maps that DotA.