True, Office is slow due to it running under rosetta, but 9 seconds is about double what Word 2004 takes to load on my system. You may wish to run through the suggestions the previous poster mentioned. Also be sure your office is up to date. I've applied all patches to mine, and the performance of Office 2004 has went up dramitically (possibly due to their patches, but most likely attributed to Rosetta tweaks Apple has been sneaking into the Tiger updates). At one point I dropped Office and Photoshop CS2 al together for OpenOffice and GIMP, however after 10.4.7 I realised I preferred the products from Adobe and Microsoft and went back and noticed Office and and CS2 performed much better and was completely tolerable this time around.
Anyhow, make sure everything, including Office is updated. Also try those suggestions to improve disk performance.
As side note, my hard drive is 7200 RPM v 5400 RPM, so that could make a slight difference. Though I do have another MacBook with a 5400 RPM and again Office is not that slow to load, but still takes a good 6 seconds.
http://www.microsoft.com/mac/downloads.aspx#Office2004
Nick
MacBook Black Mac OS X (10.4.9) Core 2 Duo, 2GB Ram, Black Video iPod