Samson, laying the smack down!
Not really, Samson's just showing ignorance...
the north east corridor is one of the worlds most busy stretches of line, the Acela goes at 150 mph in only two parts of the track but is hampered by poor infrastructure and chronic underfunding (this despite a series of upgrades in the 1990's)...it now has (as far as i can remember) as much as a 75% share in all journies between boston and DC...besides this, if you can get a train to go over 200mph (no problems nowadays) any distance under 600miles is faster than by aircraft, so the idea of 'get there and get there now!' is total rubbish...not only that but samson your idea that the 'european' and 'asian' mindset as you call it is different is simply a bad joke...japanese are currently trying to push through maglev which will run at over 300mph between Tokyo and Osaka, the modified TGV in france was clocked at 574kmh in 2007 which by my rough calculation is over 300mph...in britain there is a major push to speed up the rail links to try and replace all the short haul flights (which have brought the runways to capacity...so clearly no culture of get there now there

)
In my mind there is no doubt that at least two areas can use HSR to great affect, the NEC and in California between LA and SF...both would be quicker than planes...
Samson is right about the funding, I have no idea where the US is going to find the money from... nevertheless in Cali they just approved $9bn of funding for the HSR (first phase only) which is a start i suppose. HSR make shifts in demographics, it has been proven, France only instigated HSR in the early 80's and most European nations have only just started to implement HSR, so it's not been around for years...but it does have a dramatic impact on behaviour, getting from London to Paris in 2hrs has completely changed the way people think about planning business trips and holidays, even parties!!
Added to this High Speed Rail is fair cheaper to build per mile than a highway, and like i said if (as is planned) the HSR in the US will run at 220mph for all journies under 600miles there really is no comparison with a plane when it comes to travel times...as far as i know it also used something like 300times less CO2 per passenger for those of you that care about that sort of thing.