I don't want to get into a global warming debate, or any other kind of debate. But...with the exception of 2006 and 2009, both el Nino years, the Atlantic hurricane seasons have been very active since 2005.
Dean and Felix were Cat 5 storms of 2007. It was an active year with a total of 15 named storms, about seven or eight of which became hurricanes.
2008 was an amazing year for Atlantic storms, one of the most active on record. The present season reminds me of 2008 when Gustav, Hanna, Ike, and Josephine were active simultaneously at the beginning of September. Hanna devastated Haiti, Gustav battered the Lousiana coast, and Ike pretty much wiped out Galveston Beach and is the largest recorded storm to date. We returned from our 5 day Gustav hurrication and thought we'd have to turn around and leave again to escape Ike.
Prior to 2005, 2004 had at least 15 named storms. (I remember Otto, but don't remember if there were any after him.) Ivan reached Cat 5 strength that year, but weakened before coming ashore in Cameron, LA.
In either 2002 or 2003 (guess I could google it) my office was closed two Wednesdays in a row due to hurricanes. I could go back further, but I won't. I will say that simply gauging from the number of times we've had to evacuate, or have come come close to evacuating, since 1998 as compared to prior years, there has most definitely been an increase in Atlantic cyclone events. And since I'm a weather junkie, I know the facts will support that, I just don't have them committed to memory.