You are comparing historical mirrorless performance with DSLRs, but article is comparing them to medium format cameras, two different things. Medium format came

You are comparing historical mirrorless performance with DSLRs, but article is comparing them to medium format cameras, two different things. Medium format cameras were slower than both, older consumer/compact mirrorless cameras as well as DSLRs. BTW.. Its fair to assume that these myths are common, than to assume that someone purposely chose to perpetuate them with bad intent.