First of all thx for you message and your “presence”.
Are you sure that it is a fastweb problem? I have fw too and I find the game heavy laggy only in few maps (Lion’s Arch and Cursed Shore mostly) while I play perfectly in other zones like Divinity’s Reach or Plains of Ashford. Considering that many users are having exactly the same problem with other ISPs I think it could be a server issue…
Btw, I started lagging a lot at around 9-11 pm of yesterday evening!
PS: my connection works fine, even playing games like Guild Wars, Diablo 3 and others.
I would like to thank Matt for the answer and give my 2 cents.
It is true as Chiocciduke says the lag is only for some maps but it is not linked to a specific map since in my case Lions Arch works good.
I report also that today at 12:00 i have not suffered any lag.
At 22:00 the lag instead is too high and the game not playable.
It is useless to say I have fastweb (Milan) too.