In a way the complaints are relevant to New York City but for different reasons. The gasoline price is not an issue if you take transit, but your time is still an issue, unless, for some bizarre reason, your time is worthless. And, for most people, public transit is obscenely slow. Busses in NYC routinely move at 3-5mph even in the outer boroughs. The subway doesn't go everywhere, and unless you're lucky enough to be able to use an express, you may attain 10mph including walking, waiting, and stops. So scheduling to reduce the number of round trips may be highly beneficial even in New York.

Alas, however, this sort of measure, like much else to do with "conservation", is not overly scalable. Ultimately you also need supply of some sort, not just demand reduction. After all, if gas goes up again and your rescheduled day is already too long, what do you do for an encore?

Except that in New York, it's been this way forever, so whatever schedules have been determined to be optimal are still sufficient now. Certainly trying to get to school with a car isn't a better solution, and never has been.
The complaints will become relevant to New York soon enough.  At the very least, higher oil and natural gas prices will sharply raise the cost of the electricity that runs the subway system.  High gas prices have already impacted buses.  I bet that the MTA is running way over budget as a result.

The state government is not going to provide any more subsidy, so there will be higher fares as soon as the MTA can legally impose them.

Indeed, if high energy prices render enough Americans insolvent, there could be a sharp drop in consumer spending.  High energy prices and increased credit risk will continue to exert upward pressure on long-term interest rates, with a likely deflation of the real estate bubble.  Put these things together, and you have a major recession that will have an especially severe impact on the financial sector.

That will mean a decrease in tax revenues and therefore subsidies for the MTA and higher fares still for New Yorkers who will have less money to spend on them due to layoffs.

I'm definitely not saying NYC won't be affected. Of course it will. We'll have to pay more for our subways and buses. But at least NYC already has the country's most extensive mass transit system, and I feel pretty confident that in the future, other cities are going to have to beef theirs up.
At least you HAVE a transit system.  Can't say that around where I live.

I think that a huge number of people are still convinced this is temporary.  That it is a result of katrina, or oil companies gouging, or a bad phase of the moon, or whatever; but they are just trying to hang on "until things go back to normal."