Many request were made to specifically put the internal sites at the bottom. Re: Zerowing: it is targeted to LC sites under the LC icon, Connect sites under Connect icon, etc. Otherwize, every query would come back with 1,000 hits and not be very useful.
I believe, that the saerch should be configurable, especially as it is more targeted now. The value of search is down for me significantly. I don't believe a one size fits it all approach will sustain.