NXP didn't use radial stubs, just rectangular microstrip capacitors, but seems that everything works fine (BW about 2GHz for S11/S22 < -10dB, and even greater (3GHz) for the gain S21 >10dB).
Radial stubs works fine, until they are wrong placed on the PCB. Sometime a rectangular strip capacitor will work better than a radial stub.
If you look to the NXP layout you will see small matching stubs just near the transistor.
In your PCB, because the matching stubs are far away from the transistor, actually you are not doing impedance (or noise) matching for the transistor, but for the long inp/output transmission lines.
NXP layout is much more compact (very short traces) for the RC network placed after the stability resistors (R1, R2 in their design).