The Jargon File (version 4.4.7, 29 Dec 2003):

low-bandwidth
 adj.

    [from communication theory] Used to indicate a talk that, although not 
    content-free, was not terribly informative. ?That was a low-bandwidth
    talk, but what can you expect for an audience of suits!? Compare 
    zero-content, bandwidth, math-out.


The Free On-line Dictionary of Computing (30 December 2018):

low-bandwidth

   [communication theory] Used to indicate a talk that, although
   not content-free, was not terribly informative.  "That was a
   low-bandwidth talk, but what can you expect for an audience of
   suits!"  Compare zero-content, bandwidth, math-out.

   [Jargon File]