Just to clarify (For anyone who hasen't seen pre Saiyan Saga Dragon Ball) This is the one Goku killed, not end of DB Piccolo. Essentially Piccolo's father.
I take back the statement I made in that other thread about Kami and King Piccolo being close. I forgot Kami flicked Goku away like a fly, after he beat him.
But by the same token, Krillin faced a Piccolo who was stronger then that Kami, by Kami's own admission. Even if Piccolo Jr. was holding back on Krillin, he was acting pretty shocked at the resistance he was getting.
While the weaker Kami simply looked bored at Goku's charge (And Goku thought he was Piccolo.)