Is there any difference between sync speed with the S6 and the S5/S4? The S6 has WiFi 5 with 5Ghz whereas the S5/S4 only have WiFi 4 with 2.4Ghz. I had bought a S4 and I remember it took a long time to sync my playlist from iTunes. If I remember correctly, it took about 2 minutes per song. Has the inclusion of WiFi 5 in the S6 made a difference?