Hardware Upgrade You Say?

The server I play on the vast majority of the time was slated to be upgraded during the extended maintenance yesterday and today. While the hardware quite possibly has changed the performance of the server seems to have degraded more than anything else. The last two day's raids have been delayed and botched as a result of Blizzard's shaky servers. I'm not one to condemn them for this, after all I can only imagine the number of variables involved in migrating a complex system onto new hardware. I am, however, surprised by the frequency of server issues which always seem to come up around patch time not to mention the number of significant bugs which are introduced in them. Working in software development makes the bugs being pushed out in each patch really curious about their development process.