I'm pretty sure that my standard BOV is leaking, although it doesn't really bother me that much.
Just accelerating slowly, the boost needle doesn't even get into 'boost' and I can hear the BOV open and start circulating air.
When I bought the car the standard BOV was blocked off, I think there was a after market one on there. Now whether is was blocked off cause it was leaking, or because they were running a another one, I don't really know.
Is there any other way of telling if your BOV is leaking?
When I had it off it was pretty easy to push in.
J