I know this pain first hand.  The feedback loop for this kind of analysis is quite long and therefore much harder to actually accomplish.<p>It would be interesting to see a full-baked analysis on a landing page optimization.  Many landing page optimization "experts" tout big gains like these but ignore analysis of the entire funnel and attributing costs of sales-reps time to deal with filtering "low quality" leads. (In a perfect world this isn't an issue because it can be automated, but we all know that isn't the case most of the time.)<p>Interesting analysis, though, and I would love to hear about your deeper analysis as the data becomes available.