I'd say not only is that a confirmation that Sofia Vergara is ticklish, but the fact she so anticipated the very possibility that Ellen might tickle her in that bit suggests she's extremely ticklish!
I know sometimes it's hard to understand her, but I absolutely LVE her accent! The way she said "tickle" was soo sexy! . . . AND you can tell she's nervous about possibly getting tickled!
It was delicious to hear her say Tickle, and lovely that the first thing she thought of was that Ellen was going to tickle her... maybe they hhad rehearsed it ealier and she did tickle.
Very funny and I heard them both say it. Sophia asked not to be tickled and Ellen quickly replied that she wouldn't tickle her .... then the funny began! ha ha