After upgrade to 1.3b4 (same as with 1.3b3) from 1.231 also I've got also a very slow response.
Disabling whole advanced outbound NAT makes web page loading fast again...
After removing the NAT rule with NOT (inverting the match) on WAN,
response with enabled outbound NAT stays OK.
I've tested this with generic image not on WRAP, and get the same behaviour as Maxe reported.
Not sure what causes this, but it isn't platfrom specific.
Troughput 10Mbps (DSL speed) is OK, same as with 1.231,
Great package!
Tnx, HansT.