If anyone is online...

John McLear (@johnmclear)  is having an issue where he's got a large data set and the closer he zooms in the longer and longer the points on the map take to show up, even if there aren't that many on that particular map view.  Anyone have an idea what this could be and how to fix it?

He was kind enough to make a video of it:

http://www.youtube.com/watch?v=Jdj6avFH0Zg