He/she added an artificial network latency/delay into the config, just like they describe. That is the reason for the delay. It is made artificially long on purpose.

It’s not an unreasonable delay on a slow 3g hotspot. It’s problematic to have the performance tied to the network speed and suffer an overall slow performance because your network happens to be slow.

Have I written anything that is contradicts that? I simply pointed out that in the example the delay was artificial, and it was definitely due to network, not due to something other than network, as the comment suggested.