14b is a solid, mid 12 second turbo on an AWD car. Upgrading it before you are actually running mid 12's will not give you any benefit, but you will feel the extra lag of a larger turbo.
I kept seeing people going to large turbos, way before they actually needed to do it! So I decided to show people that going fast is not about having a big trurbo, but rather tuning and driving
. That is when I set my first 14b record (12.01 as I recall, back in '00 or '01).
But you are right, 14b is a fun turbo!!!