Higher cluster size not necessarily faster?

[WinkOsmosis]

I have two drives.. a Seagate 80gb Barracuda IV and a newer Western Digital 200gb 8mb cache drive. Last weekend when I got the new WD drive I formatted the boot partition with a 32k cluster size. But it seemed slow opening programs. I deleted that partition and am now in my old WinXP install on the old drive, which has a 4k cluster size. Programs like Eudora and Newsbin open almost instantly, compared to the hesitation on the partition with 32k clusters, AND this Seagate is known to be a slow drive compared with its competitors. I ran a Sandra benchmark and the new drive with 32k got a score of about 29,000. This 4k partition only got 25,000. So I think that programs, since they use smaller files, load faster with smaller clusters. Can anyone confirm this?