I think it really depends on the perspective of the author. In my opinion, mulititasking is a desirable trait and so notorious in this case would have the meaning of well known. Hesseltine (entry from Merriam-Webster's Unabridged Dictionary) PBF
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a (1) : being or constituting something commonly known : well known iron is a notorious conductor of heat— Lewis Mumford *the notorious mass-energy relation— P.W.Bridgman* the posses