Upload & Sell: Off
For me it's a lot simpler. Adding the 300 to a static front page gives Google something to crawl and gives it an idea of what your site is about, so it's not just googling keyword after keyword. It's not a thing that needs a lot of thought, just a description of what you do with a couple highlighted keywords.
Tom - I think you are dead on here!!! Within a couple of days of implementing your advice, my site got onto the 2nd search results page when I search for "<my city, state> wedding photography." Search for "<my city> wedding photography art" or "<my city> wedding art" and now I'm the 1st or 2nd search result (including ads!) on the first Google search page. When you look at how Google lists it, the text it brings in is right out of the 1st sentence in that 300 word summary statement. This was the culminating difference in getting my SEO fine-tuned, after sitemap generation, adding wedding specific content (posts) to my underlying blog, key-wording in the meta data, etc., which had given me mixed results.
Incidentally, if you read my 300 words, it reads like a mini-essay or artist statement. I wanted it to read "real" rather than like a smattering of keywords first because I care about what appears on my front page, and second because I was anticipating the "smattering" approach would run afoul of Google's algorithms. Sure enough, someone recently pointed out that Google's algorithms are about to get a lot more "semantic," possibly penalizing some of the SEO strategies many have implemented. Just though I'd mention that... here's the link.