probably it won't, on ping theres not much you can do.
* it depends where the server is based and where from you are
*What your connection is:
- Good internet provider or a bad provider (whatever it might be)
And what kind of package you have, as telenet provides many different things:

- Are u wired, wireless, multiple computers/consoles on one internet connection.
- What internet card u might have.
-...?
*what is your (Gaming rig)
- work laptop
- just a all round computer
-...
*** What is your computer running at the moment, what might could increase your ping.
-Only this is what u could check for and it might help to fix 10-20 ping it won't really do much, as i guess you haven't any other programs open when u currently playing arma2
option 1 and 2 is what it is. (but)
- u could switch from provider and increase the Mpbs for download and upload, but the more you want the more u pay...
- and u could also switch on the net card, but again, u will have to pay for it, and normally, any net card (of last years) is descend enough.
So ye, i don't really see u coming back any time, as the ping is 350+- u make the game for other people suck, due the Dysc in arma2
To bad as i like to see more people, but it is what it is.