anaconda update time needs to be improved

Hello I have updated 3 boxes from FC5->FC6 (x86_64) using anaconda (booted from a DVD). All three of them is nothing that can be called a slow machine: 1) AMD64 3000+ @ 4100+ (2.61ghz) 1024MB RAM 7200 RPM 2MB Cache IDE Seagate HDD 120GB 2) Laptop: Core 2 Duo T7400 2x2.17Ghz 4MB shared L3 Cache 2048MB RAM 7200 RPM 8MB Cache SATA Hitatchi HDD 80GB 3) AMD Opteron 170 @ 2x2.7Ghz 2048MB RAM 2x120GB Hitatchi SATAII HDD 8MB Cache MD RAID0

Update time was ~90-120min depending on the sys. Why does the update take that long? A reinstall is much faster.. I think that improving this should be a goal for FC7 Also why isn't it possible to install from a md raid partition? Should I fill a RFE?