That's both wrong and besides the point. There's no evidence to support your claim besides the fact that Hulk was staggered for about a second before he shrugged it off. Literally dude, the same panel that has Hulk on the ground is the same exact panel that shows him getting up. Also Savage Hulk has tanked blows from a non holding back Thor on multiple occasions so your claim that Hulk's never tanked full power blows from Thor before Fear Itself is false.
Nevertheless my point still stands. Hulk has tanked blows from characters who hit harder than Hercules and Hercules has failed to knockout or significantly damage weaker incarnations of Huk for the last 4 decades. And Hulk tanked a blow from Thanos during Infinity #6.