they have unparalleled download
I question this...unless they have web servers virtually everywhere (enough that no more then 5 hops are required) and have hacked up a method to allow the server to auto-detect which web host will be the fastest, then no...
the current host im using i get maybe 200kb/s on, but ive had a number of people located closer to the web host get anywhere from 700-1200kb/s...
so...yeah...
also...comparing maps based on the non zipped size is more logical...you can bz2 zip the maps to different compressions, rarely will anyone post the zipped size online, while the basic is quite common
so...using the basic over bzipping all the maps yourself just to see the comparison seems a bit less tedious...