Just finished dinner and I say: I haven't had this much food in a while! VS I have

[B45]

Just finished dinner and I say:

I haven't had this much food in a while!

VS

I haven't had that much food in a while!

What's the difference here?

 

[MikeNewYork]

Not much. If you are still at the table, use "this". If you have left the table, use "that".

 

[Tdol]

And if you're still at the table,but things have been cleared away, use that.