Lag in 4.0.6

To address these directly, we can’t say what any individual ISP may look at when performing any sort of Quality of Service traffic management. There are numerous factors that a traffic management console can monitor and consider as an indicator that throttling a subscriber is required. Those settings and thresholds are between the ISP and, if they choose to divulge it, their subscribers. Blizzard is not directly privy to that information. All we can truly proffer is generic information regarding the technologies involved and how it may impact our users. (Source)

Bandwidth requirements in the future

As far as increased bandwidth requirements, nothing ‘new’ is coming in the works, as far as I am aware, that will require enhanced bandwidth. Our published minimum system requirements can change at any time, depending on what improvements and innovations we introduce. What I am saying is that some issues people have been reporting have indeed been traced to their current throughput limitations. This isn’t true across the board, but this is the root cause of some of the reports. (Source)

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