Calculating Deep Link Ratio Using Yahoo
I just found this at researchbuzz (credited with the threadlink above) The article was written in Sept but apparently slipped most folks by, shame! - It's an absolute cracker of an seo tool devised by Roger Smolski of Text Link Ads that should add just one more nice tool to the seo essentials. At the time of writing i've only played around with it a little but my gut feeling is that it'll be damn useful in scoping out the competion at the very least.
"The DLR is defined as the ratio (expressed as a percentage) of a sites internal pages inbound links to the total inbound links."
The above link contains a step by step explanation of how to calculate this metric and some explanation of it's possible uses, here's a short excerpt:
It is based on the assumption that (in general), site wide text links placed on sites with extensive deep linking produce higher click-through ratios than those placed on sites with few or no deep links. This is our experience but like so many other factors in off-page optimisation virtually impossible to prove. As is another intuitively correct and similar premise that search engine algorithms show a preference for sites with extensive deep linking.