Further test shows it is indeed mixing old and current data , and they change slightly with each enquiry..now a page that I was watching earlier this afternon on "direct G serps", and which had risen, and was not in the results on foxstart, has entered the first page at number 10 ( previously on direct G serps it was around page 4 due to penguin, today it made page 1 at number 6 ) ..so some "calls" from foxstart are indeed accessing data sets which are in movement on penguin related issues..
Looks like you may have caught something there ..jez123 :)
I should add that the page in question was changed exactly 6 days ago in response to my advice..the result for that page on both "direct G serps" and foxstart says "6 days ago" ..
edit ..after a few refreshes it will now include the less than year old domains, but not every time , so it is using a more diverse / customised set of data sets than the "direct g serps"..weighted, apparently, to the older ones..
took me a while to add that as I wanted to check something with another browser, fired up konqueror, hit go , and launched an old session with 300 tabs open ! added to the 200 or so open on this Opera and the 200 or so open on firefox on this machine ..freeze ! and mandatory reboot :: note to self..next time double the RAM to 8 gigs before trying that ::