I'd say yes if they have been assembled properly by someone who knows what they are doing.

Mine at the start was certainly not, I'd say 11lb if that, low egt's alone told me the power was down, it started and ran fine and I flew it like that for about 20 flights.
I then replaced the two piece tailcone with a single piece version and made a huge noticable difference.
Egt's went up and when we done a pull test with a model strapped to a girder with a digital spring balance and the figures my not have been a true reflection on actual thrust, but there was an increase of 3lb.

I have a older wren mk2 which is about 12lb and the Jetjoe would have more thrust so I'd say it is now producing the 14lb.