Make that a few kb. And last time I checked at my work, admin updates usually happen during work hours and affects people working in the "lab". Also, it's 1 250mb that is sometimes installed on each machine on the network, so way worse than a few kb.
Your admin is doing it wrong if updates of a few kb are clogging his network. Also, small labs can't afford to pay admins at night, and big labs surely can afford a few kb transfers on their networks. We're talking about gigabytes networks and admin can always use cache proxy so that chrome only taps the net once for the tiny kb update.