And nice to see YOU here!
I have used Vector for months before I switched to another distro which at that time was more in the direction I was looking at. But, after that switch, I am still visiting the forums and reading about the developments for VL.
At that time, it was a very nice and fast distro for me, which was working out of the box, without any problems.
My point at that time was that I was looking for a distro in two versions; with everyting in it to have a working desktop, and one without, so you can make your own brew.
I do really like the VL package system with it's high compressed packages.
So, it is possible that I will give it a try again and switch back again some time
About those optimisations;
I have tested for hours and hours the time I used Firefox and the Suite (Seamonkey now).
Those settings were working very well for me.
As I remember, it was a difference of 20 percent and more that time....