Re: Lying barstewards!
I would hate to stick up for HP as I'm no fan but use cases are different.
If it is telling you that a colour is almost out it is so you can make the decision whether to get a spare ready (no-one would replace on an 'almost out' message). However as you say you do very little printing -- but in a business a laser could be printing hundreds or even thousands of sheets a day. They would prefer to get an early warning of toner running out to ensure they have a spare than find out half way through the day and have to send the intern to PC World to try to get a new one.
Our lasers are have custom warnings that are set to 20% which would still equate to almost 8000 pages left., but we could get through that in a weekend.