Thanks for the reply. It sounds then that the time to display isn’t totally dependent on the amount of POIs, i.e. 1 POI = 1 second, 2 POIs = 2 seconds, etc. That’s good.
I can probably make the big map into smaller maps but one thing which should help is when you get the feature added to toggle categories within the map too. 😉
I’m taking it then that the fast map I identified above is not a mashup which is why it is so fast.