R7 Replication Performance

My Domino server is hosted eight time zones away from my usual whereabouts. Replication (with compression and encrption enabled) typically yields about 20-30kbps. Until last week, then we migrated the Suse Linux box to Domino 7.0. With a R6 client I still get about the same speed, but with a R7 client it jumped up to 160kbps (which is close to the limit of my current pipe). The observation is totally unscientific and your mileage might vary. Feels like the transition from Warp to Slipstream.