there is one really solid / clever way to get a good hint at least.... but it kin of depends of the status of the site at the time... and crucially the title of the homepage.
(i get this from linkresearchtools as one of my fave little things it have nothing else does).
basically the site has a reasonable title - ie. something unique enough to not be like "my cool blog" but something like "Rubber Cement Central"
often if penalized it will be 30 or lower, while if its not it will be 1 or at least first page (again depends a lot - if its 'healthy living site' of course its gonna not be as useful.... you wont show up until you got your hands on something that you can retire on)
so just do search "your title in quotes" and see what you get, its one of a few clues.... i do find (if links mostly hitting home and not internals) but should have a pr of something based on that, 0 is ok. but n/a can be a bad sign i find....
art not science, but bag of tricks combined - best way is build hundreds of sites and see which work, then build them out and rest is pbn (and yes of course hire golan for making it !!)
tip: actually send him your details, its required to let him make the sites for you! i know form experience

bad me