I did post two videos of the same session with Chad on page 6.
Chad has had the luxury to play with one of the best bassist and one of the best guitarist of all time. Anthony isn't the best singer, but he does good. (Much better than Dave Grohl in my opinion.)
You also have to consider that Chad Smith is in his 60's and rock music is his genre, that he plays in. I don't think the song was out of his basket of tricks, especially considering he plays with Flea!!! Chad is great drummer, no doubt about it, but it wasn't much of a challenge.
He should of got a complex jazz song, or a death metal song to make it fair. They were easy with him considering Chad's skill level. That's just my take though.