Now, what I would like to see is someone take a color printer, weigh the color ink cartridges with a precise scientific scale, and then print a bunch of black and white documents.
Inkjet printers do use colour ink when printing black and white, to improve greyscales and blacks. Look towards the end of this article: http://www.hp.com/pageyield/en-019/...pid=re_r11087_pagyield_us_en_article_redirect
I don't think the use of colour ink for head priming & cleaning is any secret, either.
I think inkjets have had their day as general-purpose printers.
Lasers are quite affordable, faster, don't need special paper for decent quality and are less prone to clog up with infrequent use. Photo output from colour lasers doesn't compare with 6-colour 'photo' inkjet on coated paper, but is probably better than a regular 4-colour inkjet with regular paper, and fine for occasional snapshots.
I'd only consider an inkjet if I were doing a lot of high-quality photo printing and neither laser prints nor high-street prints would cut it. B&W text performance of such a printer wouldn't be an issue.