EVE Online's single-shard universe, the server hardware and game code have to be continually updated to cope with the game's constantly expanding playerbase. Each time the server is upgraded, node stability and lag in large fleet battles improves significantly. Unfortunately, this trend of periodic improvements took something of a wrong turn when the Dominion expansion came along. Before Dominion, fleet battles took place with over a thousand ships on each side and no crippling lag or node deaths in sight. Since the expansion's release, however, fleets of only a few hundred have regularly experienced unplayable conditions.
Frustrated by CCP's lack of visible progress in tackling lag, members of the EVE community have been making their outrage known. A recent appeal to the gaming media by a few players resulted in the issue getting very high exposure, which could be bad for CCP's public image. CCP issued a response explaining that lag is a high priority, and that there is even an entire development team dedicated to tackling it. Earlier this week, CCP Zulu expanded on CCP's lag-busting efforts in the first of a new EVE devblog series dedicated entirely to lag.