Regarding the repeating buildings that you can see - they will be switched in the final version. I placed them in there just as place holders so I could judge the size of the town as well as place the roads. Believe me, after working hundreds of hours on this island, I would not waste my time and yours by placing the same building over and over.
Right now, the island is about 18 MB and the final will be very close to that (perhaps a little larger if I finish the custom land textures). I am not sure of the exact size of the island, but I know that it takes a soldier 45 minutes to run from the southern border to the northern border. It truly is a massive island. I did not include a screen of the entire island, but it essentially fills the entire map - there are a few small "ports," but otherwise it is land almost to the edge of the map.
As for the long load time, I apologize for that, but I wanted to use pictures that were large enough so that you could see the amount of detail on the island.
Lag and latency is something that I have kept in mind as I created the island. I know that there are a few (and just a few) areas that will cause a drop in FPS as the area loads, but I consider the momentary drop worth the size and detail of the town. There are really on two or three areas on the map that you might experience this and if it is a problem for your computer, just don't go into that area. As for latency while playing online, I am not sure how it will react, but I have based this island on my previous island (Phaeden's Island Beta), which I did play online and I believe that there will be very little latency as a result of the island.
To be honest, I am a little disappointed that this island has met with mostly negative responses. I am not looking for kudos, but I have spent a ton of hours making this island for the OFP community and I would have expected at least a few "nice pictures" comments. I hope that the OFP community is not resorting to a state where one looks a gift horse in the mouth. I mean, it is free, it is large, it is realistic - what else do you want?