On reflection, I've had quite a few of late.
IIRC, I've been op-up'd from J>F 4/4 times from BLR this year. I have often wondered if it's "real" first though when I have been up in F. The only difference I could find last time was that I was offered an arabic coffee before take off, and my headset was in a velvet pouch rather than a polythene bag.

I seem to only ever get upgraded on the shorter flights I take. Still, mustn't grumble!