It's a change to the profile so it sent the whole profile. With the exception of monster box sets, I think it would take just as long to transfer.

i just changed collection numbers for about 1300 profiles then did the sync... I can confirm that it is slow... not as slow as the original sync... but considering this is a 3 second task on the desktop, the amount of time it took for the phone to copy was unexpected (except that i read this first) - this is an area that can be improved in future versions, but is not critical...

kudos by the way on letting it continue to sync in the background... i was able to use other apps and do other things while it completed... with that said i'll add a feature request for some type of push notification when the sync is complete.