But do you then need to go on about it to all and sundry once you've moved in?
We visited friends new house. "It's lovely" we said, "nice garden". The reply, "yes, we love it, and it's only 22 minutes into central London"
(completely ignoring the fact that it's 20 minutes to get to the station).
Husband comes home and the same convo happens with him.
We meet their friends in the local pub. Them: "have you visited before?" Us: "No, it's our first time here", them: "oh it's so handy for us, wouldn't live anywhere else, it's just 22 minutes into central London".
The husbands mate comes for breakfast the next morning. Him: "what do you think of the new pad?" Me: "fabulous, love it". Him: "so handy as well, it's only 22 minutes to central London" 

Cue me and OH pissing ourselves for 10 minutes then having to tell them what a bunch of twats they sounded like parroting on about the precise train journey to the last second.
Of course it's relevant to someone buying a house. It's not relevant or interesting after that. It's pretentious