They just don't want to submit them yet -- work being done on the compiler and such: http://www.reddit.com/r/programming/comments/2krih/factor_90... (granted, this link is a year old)
For some hand-spun results, you can check out http://factor-language.blogspot.com/search?q=shootout or http://factor-language.blogspot.com/search?q=benchmark. I think the most recent results for Factor's benchmark suite are at http://factor-language.blogspot.com/2009/08/global-float-unb....
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