The difficulty update should address that.. what I believe is happening is that some parts of the network have high enough hashpower to get the next block out the fastest to the point of mining 5 blocks before anyone else even has a chance to. This is possible because of the broken difficulty code which allows valid blocks to be mined without much effort otherwise there would be time for you to mine your own block in between.
So it is 5 blocks per 10 minutes on the network? I mistook it for a speed limit on the individual miner, not the entire network. Your comments about the lottery were noted, thank you for the clarification.
-David