I have my Virgin Tivo box connected and I haven't noticed any drops, in fact I just watched match of the day (fantastic result for Cardiff by the way) and I saw no drops in any of the games shown, looks the same as when the Tivo was connected directly to my amp. Watching Soul men now again I haven't noticed any frame drops.
yer i only notice it when I watch sky sports news or Sky news, you can see the ticker not scrolling smoothly but even that is not as bad as some judders ive seen.
I watched football looking for issues when there was panning and I didnt notice it even when looking closely. I used to notice it a lot on sky go on the 360 but put that down to it streaming on the internet but now I guess this effect was probably the main issue.
I do think MS have thought about it and this is their solution, it would be nice to have the option though of say a 50hz dashboard that flicked to 60hz for games, I watch TV more than I play games.