Elevating subwoofer about two feet off the floor


Acoustic Sciences Corp recommends elevating the subwoofer about 2' off the floor http://www.acousticsciences.com/products/subtrap

see photo in link above ... has anyone tried raising their subs that high off the floor? Did it sound better?
tweaknkeep
Hmm tweak you must be in NYC since they were only doing local pick up.   I might have gone for these myself if I had seen them.   
I know this thread is old but I just raised my subs about 2 feet off the floor.  I use small Pinacle subs that are dipolar.  My idea was to get the subs out of the mess that is floor level.  

Right away there was improvement. At first I thought they were louder but now I don't think so.  Now I think they're just more integrated and clearer. 
It is just a frequency response thing. If you had room control you could make the woofer sound the same and be more efficient and probably go even lower. If you have control of frequency response on the floor or in a corner is always going to be better. But if there is a response aberration and lifting the woofer helps and you have no other way of dealing with it you are stuck.  
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