It's not 5% of a page, it's 5% coverage on a page. Say, a page worth of text. It should be obvious that if you're covering 450 pages with solid black ink... wait, no, it shouldn't. If you're covering 450 pages with solid black ink, you're an idiot, and nothing will be obvious to you. For instance it wouldn't be obvious that you should just go buy some black paper.

The 5% is not some kind of scam. It is the industry standard for page yield. Every brand uses the same metric for this. This person just wasted their ink, and is mad at someone else about it.

I thought 5% was an insanely low amount, until I saw this in the forum thread ([isotc.iso.org]) the ISO standard text page used for the 5%. At my job, we get about 10k pages with a CB400A ink tank for our HP printer, about that 5%. Personally, I print mostly 10%, considering a double spaced, monospaced font paper with .5 margins on all sides (College standard is double spaced, times new roman 12, 1inch margins on all sides, so 7%)

By comparison, the Gigabyte vs Gigibyte thing is retarded and usurious. Everyone recognizes storage space as 1024^n (2base) like the computer displays it, not 1000^n (10base)like the manufactures advertise it. Until Apple and Microsoft change to the 10base, they should not be allowed to pull that off.