I've been reading about this but am not sure whether it could actually work. Increasingly it is becoming harder to rank new domains, to the point of being discriminatory against new domains. To counteract this I've been thinking of making my sites on old domains - the main disadvantage about this method is that I will not have the keyword in the domain. I also have xrumer. And I am not really using it except for white hat shit (lol). It's like having an uzi but being too scared to pull the trigger. This is because xrumering a new domain is asking to be sandboxed for like a year. Does anyone have experiences with using old domains to rank quickly?