Interesting thought, but no. With all due respect ..

First, it seems that this is a solution looking for a problem. This work at Slash Dot because node reputation is capped at (-1,5) so browsing at +2 or +3 means you get to see mostly of the good, useful or funny stuff. This breaks here at PM; nodes are less numerous and higher (I hope!) in content. As you point out, it also doesn't work with newer nodes -- a terrific writeup might have been either ignored or just be very new.

Secondly, I look at nodes based on the title -- if it's something I'm interested in, or maybe if I'm interested in following a particular Monk's scribblings, I'll check it out. I may check out a node on the Best Nodes list, more out of curiosity than anything else. Yesterday I read and upvoted a node before I realized that it was the #1 node for the day. That's just fine. I don't blindly upvote top ten nodes and down vote Worst Nodes. All nodes stand on their own.

Finally, filtering on XP is applying subjectivity (everyone else's) on top of subjectivity (yours). I don't think that's necessarily a valid filter -- but that's my opinion.