The issue sizes are not down to compression sizes of pics but it is something that Adobe are working on. At home i have just 1.5mb download speeds but i still managed to download the latest issue last night in 20 miniutes. At our office we have upto 70MB downloads and like a virgin on his first bunk up it's all over in a matter of seconds!
It's the video and interactivity that pushes the size up. But it's the video and interactivity that really makes the App so good. It makes the whole App much more entertaining and is well worth the wait.