1. Land Store is exactly 100x5 sims and has always been since beginning of my observation, i.e. 24th of March. It's size and position never changes.

2. According to my map, most of the growth during the period of observation is accounted for by large checkerboard-patterned clusters of sims, most of them clearly residential - i.e. relatively few landowners bought relatively large numbers of sims each.

3. By my count, since 24th of March, 2391 islands sank and only 4194 were created. That includes new Linden mainland.

Data is collected by grabbing all the sim coordinates for which map tiles exist and then querying Map API to see if they're actually still there, it is limited to only include sims actually known to be accessible - i.e. things too far off the map are not included.

My guess is, the raw data disclosed by LL is somehow bogus. :)