Its not pretending to compete with the likes of the Titan so i don't think they will be disappointed with their demo at all . The better results with the T-rex could be mostly down to high heat though as mentioned . That could be fixed with a variety or a combination of heat sources . What they have achieved is to offer a low running cost alternative to an entry level TM ... In USA tests its performance is the same as a 16HP / 33 blower .
They seem to be taking the concept serious in the states , even though ' gas 'is cheap there , entry TMs are cheap and at 120v they have to plug into special 230v utility room sockets which are only available in some states . So it makes even more sence in the UK where running costs can be high, and we can plug it in almost anywhere without issues .
It might depend on your working area how practical it is to run cords , i'd say about 90+% of houses / businesses in my area have parking to the door so no problem using .