Was out in the saff on the weekend and I don't know if it's just me or the car is coming on boost quite late....knocking on for 5k before full boost

Breif spec is,

T34.63
Siemens 55's
Ported head
BD12 + 14 cams
7:5.1 comp
500 cooler
mongoose system, 3'' from turbo back
MSD 380 chip

I don't know weather I'm just used to the power now or there's a problem cause the car just doesn't seem to pull as hard when it comes on boost.

Any ideas what it might be or am I just being daft?