uswitch,

similar experience here - i was looking at the ready reckoner and some of the smaller website on it tallied with the figures I was achieving - what I also had was an .ie domain website that had a very targetted audience in a niche area.

After a few emails, eventually got talking to salesonline but was told that my PIPM would need to rise significantly before they'd even meet with me - they put me on to a smaller company/agent who I met but never got anywhere with..

to be honest, currently using AdSense on the site and earning a bit from that...