Iniesta is a world class player no doubt. I´d say there are different tiers of "world class" though. Messi and Ronaldo in a tier of their own, then a 2nd tier with players like RVP, Zlatan, Xavi, Özil, Rooney, Cesc. For me, Iniesta is in the third tier of "world class" with players like Silva, Aguero, Benzema, Kaka.
12+12 in 61 games isn´t THAT impressive btw. Especially when you factor in that he plays for the best team on the planet and the reigning World Champions and Europa Champions...