Because grml is based on unstable really much has changed, so I wonder what the outcome might be. And it really astonished me:
sent 189798 bytes received 377290139 bytes 444879.12 bytes/sec
total size is 727541760 speedup is 1.93
That means in fact, that only (189798+377290139)/727541760*100 == 51% of the total iso image file size got transfered. Woohhh!! People, pretty please start using rsync for such jobs more often!