Re: Can we compare Tube travel to a ride in a Taxi.
That shows walking times between stations on the same line, but not walking times between stations on different lines.
Paddington to Lancaster Gate looks like you have to walk half-way across zone 1. You don't.
Warren Street looks like it is mid-way between Euston Square and Great Portland Street. It is practically next door to Euston Square.
Queensway to Bayswater looks like they are a fair walk away. Again, they are practically next door.
By walking to a different line, you can sometimes save massive amounts of time on your journey.