I went into this in detail last time we discussed this on here (about eight minutes ago), but basically I reckon it’s dependent on the industry you’re in. If you’re applying for something where you’re going to have a lot of different skillsets, it’s going to be a longer CV than if it’s a very specific role.
For instance, if you’re applying to be a bus driver, your CV is going to say “can drive a bus” and perhaps mention that you’ve got a clean PSV driving licence. I could get that on the back of a business card. Whereas, if you’re applying for a job in IT or some such, where you’re typically required to have a broad range of skills and experiences, that makes for a much longer CV.
My CV’s first page is contact details, pretentious profile overview, and a list of core skills. Everything an employer needs to know about “can he do the job” is on that first page. The next two are the usual employment and academic history etc (and is in dire need of pruning TBH).
I’ve seen single-page IT CVs and they are universally dreadful, either unreadable or written by a gibbon. If I’m looking for a candidate who is a proficient Windows and Linux sysadmin, knows Exchange inside out, has a passing knowledge of Mac desktops and can amend a Cisco ASA configuration without dropping the entire network, then a CV that says “I know about computers, me” is going in the big round file.