Unique Visitors = 1/10th of Unique IPs?
Max Fomitchev submitted a little blog entry where he proposes that the ratio of unique IPs to actual unique users is 10:1. This flies in the face of the numbers you usually see attached to these sorts of things. I'm not sure about the logic he uses to come up with these numbers either.
The 10 was a hypothetical...the only point was that you can't trust the number of recurring visitors that a site reports because they users come back with a different IP (obvious) and get counted twice. Couldn't one use cookies and IPs in combination to get a better gauge? The IP may change but the cookie would not. Sure some may delete it, but it'll still improve accuracy at least a little bit.
So, he's saying my website has 1/10th of a visitor?
This guy's the limit!
I help keep this in balance by using my neighbor's wireless, that IP has a load of unique users.
Can he find a formula for the number of /. articles posted vs. the actual unique articles?
First of all, a DHCP server is typically going to give you the same IP address each time your computer requests it, unless there are more users than IP addresses, in which case there will be some shuffling. But that tends to be when there are more users than available IPs.
There are entire domains hidden behind a NAT device of some sort. This would be many users per IP address. TFA didn't mention this at all.
So I think TFA is indeed arbitrary, and also wrong.
bp