My complaint is not that you disagree with the blog or that you don't have the time to dig through all the references (neither do I). My complaint is that you've presented something as fact with no evidence and continue to assert its unquestionable truth in the face of contrary evidence. You've made no actual attempt to defend the claim except to say that others agree with you. That isn't knowledge. I'm not even sure it qualifies as an appeal to authority. It's just dogma.
You're right to be skeptical. You're not right to be dismissive.
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My phone also uses sans-serif fonts almost exclusively and I read a ton of stuff on it. It definitely has a high enough resolution (>300ppi) for serif fonts.
I have a suspicion that 90% of the functional effectiveness of any visual aesthetic is learned experience. Witness the outcry over 48fps feature-length films, for example; people complain that it has a "cheap" or "soap-opera" feel, because cheap productions and soap operas are the dominant media filmed in high-speed. This affects the enjoyment that movie-goers take out of their experience, and thus the overall value of the product.
The inferences we make about functional differences in the aesthetics of type would clearly be biased by this phenomenon. It might certainly be possible for controlled observations to reveal that reading speeds are faster for serif type; but this might be due to the fact that the reader is used to it, as most long works are already printed in serif type, in part due to the assumptions of book designers that serif type is faster to read!
You're right to be skeptical. You're not right to be dismissive.
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My phone also uses sans-serif fonts almost exclusively and I read a ton of stuff on it. It definitely has a high enough resolution (>300ppi) for serif fonts.