Will it slow down?

have been reading a lot of posts talking about "clean installs" and "erase and install" I just bought a new 24" iMac and got leopard in the mail today via the 9.95 upgrade program. Will simply doing the upgrade normally degrade my system speed? any input would be greatly appreciated.

from what i've been reading, archive and install is the way to go. Seems people are having less problems doing that than those who just upgraded (i.e. me). So archive and install and then throw away your previous systems folder.

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