The best performing trains in the NY metro area are Metro-North, serving Westchester and Connecticut, followed by the Long Island Rail Road. New Jersey? Forgetaboutit!
"Long Island Rail Road officials said the railroad had delays at rush hour in part because of the paucity of platforms at Penn Station, which must handle dozens of trains arriving and departing each hour.
Metro-North's" lines to Connecticut and Westchester, which have the best performance in the region, benefit from having spacious Grand Central Terminal to themselves. Still, trains on the New Haven line perform worse than the others, primarily because the cars are holdovers from the 1970s and some of the track uses overhead electrical wires that are nearly a century old and prone to damage.
New Jersey Transit's (trains to Penn Station, NY), which recorded the worst performance of the three railroads...must pass through a two-track tunnel under the Hudson River that is shared with Amtrak."