I'm not sure if this is the right place to ask this, but I'm curious as to how this would affect optimization with tile maps. I don't think the manual addressed it:
<img src="http://i.imgur.com/bHeNxnv.png" border="0" />
Rather than using all of the tiles shown here, how much of an improvement, if any, would I see using only the highlighted tiles in combination with the flip and rotate tools?
My understanding from the blog entry is that it's looking more for blocks of identical tiles in the actual layout to group so I'm unclear if reducing the amount of tiles in the map would be any improvement at all (apart from reduced download size).