If your question is if a single person running a private blog has the same fact checking resources as a big news corporation, the answer is no but I'm not sure why you'd need me to tell you that.

As mentioned in Gruber's retraction (https://daringfireball.net/2026/08/retraction_app_store_reje...) it's the first time he had to retract something in 24 years. It doesn't really make sense to compare the two in any case as the stakes and resources are very different.