This chronic problem of lag is certainly very frustrating for the majority of the players, but it eventually disappears after a few days or a few weeks such as I lived it. This problem is even more frustrating for the passionate players who cannot refrain from playing Diablo 3 every day.
Be that as it may, relate its problem of lag on the forum allows to know that it exists. However, speculate on the possible causes of the lag without doing any tests at priori or still, reprimanding Blizzard with unfunded conclusions do not really help Blizzard and his staff to help us to solve this problem.
For my part, I found that my problem of lag could be due to my internet connection.
To be certain about it, I used the same laptop on another internet network (at the university) with the same configuration and I’ve been able to play D3 without any lag while at home, the lag was chronic.
Then, I asked the question: is it because my connection at home is too slow? I made succesive speed tests of data transfer at home (90 mbits per seconde of upload and download) and at the university (30 mbits by seconde of upload and download). I thus noticed that even if the internet network of the university is slower, i didn’t lag while chronic lag occured at home.
Thus, the problem of lag can be in internet connections, but not in its speed of transfer.
In such circumstances, it would be interesting to analyze in real time (while the player plays D3), the packages of data ending in Blizzard’s servers on an internet network which lag and one with no lag.
More exactly, it would be necessary to verify if the packages of data sent to Blizzard’s servers go through the normally defined pathway. For example, it would be necessary to be able of predicting that the package of data to send is going to pass by the node 1, the node 2 up to the node x. If the package of data is not passed on by node planned, then it could explain the lag.
If the packages of data succeed to server Blizzard by nodes planned then it would be necessary to verify if there are abnormal delay between each of the nodes which separate our computer of the Blizzard’s servers.
Personally, I have no computing resources to make these tests, but I invite you to make it if you are capable there. The invitation is also sent to Blizzard, if this one has not already made these tests.
With such information, I think that it would be possible to conclude some things of " raisonable " on the problem of lag-related to the internet connection.
N.B.: Sorry for english mistakes, this text has been translated from French.
Edited by EstiDeKaliss#1449 on 12/19/2012 2:49 AM PST