I agree totally that its not possible to do this successfully in 10 gallons (US gallons are even smaller than UK gallons).
However a larger tank with live rock at the ratio of 1kg per gallon or even high would be able ot hold livestock immediately as long as the live rock is fully cured and as long as the bioload is not too great.
Live rock needs waste products to keep its own bacteria poluation alive. If you place excellant quality live rock in a tank which it full of well matured airobic and anerobic bacteria then they need a supply of waste material or they wil die off. No waste products and your live rock begins to lose its efficiency.
Therefore people ofetn make the mistake of waiting a week ormore then add a fish. Then they see a smal to large spike in the bioload. thisis because the bacteria is now having to play catchup when they didnt need to if the fish were added earlier.
Now dont read me wrong, i am not saying go out and fill the tank with a shoal of chromis or anthias right away but its good practice to fill the tank and place good quality cured live rock into the tank. then (probably the next day to give the tank a chance to let the sand settle and clear the water) its possible to place a coupleof small fish. I can assure you that you will get no spike in ammonia, nitrite or nitrate if the rock is good.
In fact its probably even easier for people in the US as the rock doesnt have to be shipped as far, this rock is far better quality thaan we have in the UK so i would say the chances of doing thisis even high. In the UK we have to have rock shippd over to us and then cured for at least 6 weeks so as to make sure the rock is stable. Once this is done the rock is stable enough to take on stocking levels.
Living close to the NAtional Marine Aquaruim and having reliable contacts in there has assured me this is no problem in larger tanks.
All my tanks have been setup and running within 48 hours by using hand picked good quality live rock.
Sorry to sound controversial but it does work
)