Vista - Face recognition bias?

Has anyone else noticed any bias in the face recognition aspect of WLPG?

We all realise that WLPG doesn't do a very good job on recognising faces
which aren't mainly vertical. More than about 15-20 degrees from vertical
and WLPG probably won't see a face. Okay.

However, I'm working my way through my photos and I'll swear that it
recognises more faces tilted slightly to the subject's left than it does
to the right. In other words, if a face is aligned in the photograph --
slightly NW-SE it is less likely to be recognised than if it is aligned
NW-SW.

Anyone else see this?

--
blj