I'm agreeing with iPwn and Verbatim here. First, you're always running faster with a new install and it gives you the opportunity to not cloud your computer up with stuff you haven't used in months.
Second, if you're installing windows 8, it will detect the SSD and disable things like hibernate and and paging to the SSD which uses up write cycles needlessly. Maybe I've gotten luck here as I can't prove this via links, but I never had to disable these myself on SSD installed windows 8 where I always did on windows 7
Third, Think of it like a giant defragment of your drive. if you clone it, it's going over as-is fragmented and all. While not so much of an issue with SSDs it still has to read around to find the data. On a clean install at least initially everything will be much less (if not at all) fragmented.
Found a link talking about windows auto-tuning for SSDs: