Hi Ben
Thanks for reply. Yes I believe people are more likely to use FB Search to search for page/company/brand name than actual product keywords, but when a company's name is pronounced First Second Third, even though its written concatenated I'm thinking they are more likely to key in to search as seperate words, and if they can't remember all the words and just type in some, then as FB SEarch only matches on full strings I think going for separate words in Page/Username makes more sense.
I guess this question is one where I'm pretty much 80% sure of what is right, I was just kinda hoping from some input from folks with much experience than me in Facebook marketing to confirm my conclusions.