Just been testing my 2.2 tdi boost today as I am replacing a weeping intercooler at the weekend and wanted to know the before values.
I get pressure at the manifold of 36 psi
Boost pressure of 22 psi
14 psi at air filter
So I guess the reading you quoted was pressure at inlet manifold and not boost.
Either way it looks like my new intercooler isn't going to improve things other than the stain on my front bumper.