m250 and 3.x firmware

I have the m240 with 3.x firmware and now I just bought a m250 with 4.x firmware.

My m240 player is really fast, but I noticed that my m250 with the 4.x firmware takes a couple seconds to skip from song to song. The m240 with 3.x firmware does it instantaneously. Is this a problem with the firmware or the player itself?

Anybody with an m250 2GB and 3.x firmware notice this problem at all?