Don't get me wrong. I, personally, love your style and your paintjobs. BUT something that was painted 3-4 years ago (to what is considered a very high standard back then) can't be compared to the top quality jobs today. Something that scored maybe a 9-10 back in 2009 will score maybe 8-9 in 2012. Something that scored 9-10 2003 will maybe score 7-8 2012. All the techniques are constantly being improved, and so are the tools too. Better tools, better paints, etc. Also, the thought about the base has changed over the years. Several years ago a simple base was considered good. These days, to score a 10, you pretty much need a really solid base too. Same thing applies with conversions (and sculpting, too, to a degree). A couple of years ago there were minor alterations, these days, people almost expect more alterations to create a more dynamic scene. Yours got pretty much neither of this.
Again, don't get me wrong. Top quality in 2009 for sure! But it can't be contested with the top jobs of 2012. This might be an explination to why it is a bit less scored than what you might expect.
Edit: Also, no, people do not simply look at the paintjob. There is so much more taken into consideration. The paintjob will most likely, for most people, have the highest impact. But then there are 1.) sculpting/conversions, 2.) the base, 3.) honestly, if people don't like the miniature, it will get a lower score regardless of it being top notch or not, 4.) name, yeah really, if you've got a name people tend to score it differently than if its "average joe" that posts it.