New Kohler toilet with itty-bitty tank

Yesterday I got to see the new Kholer toilet that is suppose to be competitive with the other super flush toilets. I was surprised at the itty-bitty tank (1.4 gal). Does not the small volume of water defeat the purpose of increased size to flush system so that it is once again an average toilet? Is the 1.4 gal tank required by law (same pin-heads that give us the plug up toilets of today)? Doesn't the American Standard and TOTO have 1.6 gal tanks?
Thanks for any help
u4ick
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-Laissez Les Bon Temps Rouler-

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