it also depends on how slow your computers are i have 2 computers that turn their data in almost every 30 minutes but 1 computer that turns its data in evey 5 hours and 2 other computers somewhere in between

so in my case the stats graph only "misses" data over the last 5 hours or less not over a major segment also since that slow machine only makes up about 13k of my data it is barely even noticable on my graph compared to 3 machine reporting between 95-140k each