We've moved this from pmAA to pmUS. /Moderator
I hope all of you complain.
As the aircraft gains altitude, they will maintain cabin pressure to the equivalent of 8,000 MSL or higher pressure / lower altitude.
As to the alleged pressurization problem from the GA, the explanation is about as substantive as a pilot telling the new guy to "get a bucket of prop wash". As a pilot I'd certainly have called the GA on it.