You can tell the DLC is popular.
Every Monday when they announce the new ones at rockband.com the servers get flooded with people F5ing to see the announcement.
In fact this week it was so bad they shut down the site to make a new server to handle the traffic.
But about this month so far. I am a little disappointed. Luckily March looks way better with some hard thrash, some good singles, some Trent Reznor, and some good ol' Metal.