I have a question as well, why does this lag affect a group of people?
Might be related to old bug: http://dota.eurobattle.net/la/forum/index.php?topic=156588.0
are u guys having lags this days?
I do not experience any lags;
it explains the fact i have won 99% of my games recently; basically everyone is lagging, but not me, ha-ha-ha, deered!
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I can also guess that it is because of more players online, due to massive isolation related to recent known infection;
Same thing happens to Path Of Exile, for example, - server does not handle abnormal amounts of players;
This is just a guess !
Stay deer !