Actually the most significant difference is whether you're looking for latency or not. In a critical piece like this or for anyone trying to put Kinect through its paces they would be experiencing latency. On the other hand if you're not looking for latency and are just aiming to play the game your feelings of latency would be completely different. Its a critical bias which doesn't reflect real world useage.

PS and I know about the extra game logic on top of Kinect processing. However I cannot say how much is serial and how much is in parallel with Kinect processing.

I can't speak for anyone else yet I do notice lag with games that require percision like racing sims for example. Lag has been notice on HDTV for years which thankful most HDTV now has a gaming mode.

 P.S As far as motion control lag vs controller lag,  I will notice lag more when the  game is trying to copy my movements.  For example I notice lag in Forza 3 (actually it's active steering) using a steering wheel  that I wouldn't notice  using a  controller.

Where do you get the 100ms minimum for Kinect? 30fps camera = 33.33ms per frame, just like for move 60fps = 16.67ms per frame.

Was there some testing done that these number came from that you did not reference?

Without a source and with no logical math these numbers appear just made up in an attempt to justify a desired outcome.

Is this including Wii motion plus?? If not that is a silly comparison.

yes, wiimotion plus makes no difference it just boosts the precision, already answered earlier on

Eh, no, GC3 is about as good as a lightgun can get off a CRT.  It's the same basic tech (dual IR) Namco and Sega use in modern arcades (though Sega's started using quad IR now), it's far faster and more precise than a single traditional camera that approximates a pointer (which is more or less what Move does, it compiles the bulb position with tilt/yaw data to calculate it's pointer, which is a far more processing intensive solution).  And knowing this guy (longtime arcade freak, can spot 60fps immediately, has nearly every lightgun game ever released) he's most certainly not wrong.

For pointer, it really is GC3 > Wii IR > Move/PSEye.  But again, just for pointer.

By the way, there are several claims that Kinect has a hardware lag of 150ms (just google for it). As soon as we have precise numbers, I'll update the opening post.

what is the hardware latency of a  normal controller like the dualshock ??  do u know?

Almost the same as Move, that's where the move is impressive.

No, the only point is whether you act or react. In a game like table tennis, you always see the white ball coming, and after a short while trying, you learn to precompensate because you know what is happening in the next second. You are therefore acting, by learning to precompensate the processing delay of the system. I've seen many people trying table tennis and everybody missed the shots in the first minutes until they automatically precompensated the lag by acting early (lag which was very noticeable for an outside observer, in the range of 250-300ms, but completely irrelevant to the player(s)). Kinect's table tennis, by the way, is a thoroughly enjoyable game - for about 20-30 minutes until you see how very simple and repetitive the game engine is performing.

Now the problem is games where you have to react, or in other words, you don't know what happens in the next second. Say a shooter where an enemy pops up from behind a cover. There is no way to precompensate a reaction with an early action here, because you just don't know. This will be Kinect's achilles heel, but we already knew that, didn't we?