Question about recent Sony BD players and PAL/50hz conversion

[C.mcbraggins]

I heard that most (factory region locked) Sony players from mid-2014 on can play back region free discs with PAL/50hz content or convert to to 60hz. Now, my question is say if I play a BD that is 1080i50hz (25fps), does it convert it to 60hz keeping its original 4% speed increase (and possibly introducing field blending), or would it properly convert that to 24fps by decreasing the speed and some kind of deinterlacing?

I remember seeing one multi region DVD player that had 50hz to 60hz conversion but the sample had some kind of strange motion blending going on, and that's what I imagine most players do for these conversions with the Sony's possibly doing the same for 50hz BDs as well.