FAR FROM IT. I don't know where you get that 1/10 figure, but it does NOT apply to high speed trains. Interestingly despite all the belief that European and Asian nations are ahead of us in train usage, a far larger portion of our freight traffic goes by train than either Europe or Japan
http://people.hofstra.edu/geotrans/eng/ch3en/conc3en/modalspliteuusjapan.html
Freight is ideal because it does not require terminals, tight scheduling systems, it does not have to worry about half empty trains or layovers of a few hours while another train hooks up. And freight is heavy (unlike most passengers) which makes it an ideal rail cargo. Rail systems tend to optimize for one or the other (not both) and our does a damned good job of freight hauling.
But lacks the sex appeal that politicians love: No big glamourous stations with photo-ops, it does not have the ultra modern green panache (even though it is a relatively green technology). Politicians (remember Mussolini?) built their reputation on glitzy train systems.
Check this article using graphs from DOE figures comparing transportation energy consumptions
http://www.templetons.com/brad/transit-myth.html
Have you seen a map of Japan and compared it to a map of North America. Japanese geography does not lend itself to rail for cargo.
As a rule of thumb, rail efficiency starts at about 350 to 500 miles (600 to 850 km). Below those distances, truck is more efficient and ultimately cheaper. Most freight in Japan, whether domestic or international, travels about 60% of that distance.
Japan moves massive numbers of people by train, very well. It does not move freight by train, as the distances are not sufficient to require same. They have three main ports of entry/exit, and they all serve the industries and consumers within their reaches.
Europe is similar, just larger, so really more comparable to China (than Japan). The rail network is massive, but it's used chiefly to move passengers. Most trips are 50 to 300 km, though. They are only now starting to look at rail for cargo, and that's because of the opening of the markets and production facilities in the former Soviet Union and satellites. Prior to that? Not much sense in railing from (say) Paris to Basel. But Bucharest to Antwerp? That's a different story.
The USA is massive and lends itself rather nicely to rail transit. And when the need is there, it can move quite efficiently.
If I could get you on a train on Saturday that would get you to downtown Chicago on Monday, would you take it? We're talking 40 hours, roughly, and through some fairly interesting country, including the lower Rockies. (That same train makes Colombus on Wed and New York on Thursday.) It exists. It moves containers, though, not people. And this isn't like the Maglevs we have over here - just good old American container freight trains. If they cut out the whistle stops the currently available quote-end quote high speed trains in the USA could make it in about 18 hours (Maglev in under 10).
And the thing with passenger rail is that you can get up, move around the train, have a decent meal, stretch your legs, use your computer, etc.... Try doing any of that on the United flight from LAX to ORD.