I'd agree we need clarification.
The sled will load up down low if you are barely on the throttle, been idleing for awhile or cold. Honestly, my NA sled would even do this in certain situations. Its part of 2 stroke in variable weather more than anything.
On the flip side, if its loading up or seems rich in a more "material" way, that could be due to a thousand other things. (boost leak, bad belt, etc etc)
As far as the whole "race gas intercooler" thing... cmon. Apples to Oranges.
All I'll say is Silber's charge tube design does encourage mid/top end performance more than bottom end performance. Unless we decide to be like F1 and vary the volume of these tubes/air boxes dependent on RPM, there will ALWAYS be a compromise. This is one reason you are going to find more total performance with a Silber kit as X psi than BD kit at the same PSI, same size turbo...