Since we're citing European trains, let's also cite European airports - I can arrive to the airport for an EU flight 20 minutes before take off and still have plenty of time to get everything sorted out. And I'm out of the airport within 15 minutes after landing - usually stepping right into a subway or something. I don't think it's such a huge margin if you fix your airports, which is going to be many orders of magnitude cheaper than building high speed rail from everywhere to everywhere.