From what I saw on the maps, it looks like the railroad and the airport are just over a mile apart. Therefore if the monorail/light rail/heavy rail goes an average of 20mph, it will be at the terminal in 3 minutes. The MN rail line isnt that slow with 70mph over most of the route. I'm not sure what more you could ask for with a rail line because Metro North trains generally run express from Secaucus to Suffern
I think he's suggesting that Stewart may be just a bit too far to make it useful for NYC, which I tend to agree with. However, it will be a good airport for Westchester/Rockland Counties.
And why waste the opportunity for a one seat ride on some idiotic monorail? PANYNJ blew it with EWR TWICE! PATH should be running there. MTA blew it with JFK. They owned a single track ROW into the airport, and decided not to bother with it.
No more stupid connecting monorail/light rail service to the airport. SEPTA has it right with the R1