Slow Performance From Outlook 2007?

I'm not experiencing slowdowns but it does make me wonder about usuing Outlook 2007 as a feed agregator.

"Adding RSS feeds can quickly swell the in-boxes of many users to more than 2GB of data, according to O'Kelly. He said that causes Outlook 2007, especially when it's running on PCs that don't have large amounts of memory, to write to the hard drive much more often than it typically does -- resulting in performance slowdowns. Hopefully, Microsoft will be able to better tune that part of the software before the next major release, O'Kelly said."