This may be true for any algo...
On TRTL v2, a AES cpu is close to an asic: all instructions are native (the 128-bits multiply, the 64 bits divide, the squareroot, and of course the AES) with all data fitting into the cache, assuming you have a decent CPU (read: not an Atom).

The next release will default Turtle to v2, as it has just forked, and will enable it among the eligible algo for pool autoswitch.
I'll release CPU version first.

As an exception, i'll ship the new Graft fork right now, with no test on a real pool (tested only on a local node). As --variation 22.
Sorry Unclwish I won't delay the release to investigate your bug since the Turtle fork is somewhat an emergency issue.