That's fair comment. Given the size of these games I doubt we're looking at huge Gigabytes of file here though (are we?). I wouldn't worry about it too much. Unless you've just created a monster of an adventure, in which case that sounds very interesting. ;-) For instance my adventure which is almost done weights in at a merge 1.78mb (its got a fair number of locations, masses of scenery objects and items and text and a new font and loading screen), which would take all of 5 seconds to download if that. ;-)
edit: Having said that I realise people have differing download rates, I have a whopping 196 mb/s download, while others have just 2 mb/s but even then this should take only seconds to download.