Asking for a real time stock ticker is also not using "real time" as a term of art, having a 2 second delay in stock data might be a failure to deliver on application requirements, but it is not necessarily a failure to deliver a "real time" system if the 2 second delay is strictly reliable.

The non strict usage is far more common then the term of art. One would be well advised not to assume "real time" is being used as a term of art unless specifically called out, or clear from the context.

I'd say common usage of the phrase "real time," means with respect to human perception, and that is how its being used here.