I don't think there's any evidence of this. The benefit of a circle derives from its ability to focus multiple energies on a single point, and therefore the precision of a circle is what gives it power. If a person links it doesn't make their own ability any stronger - and that applies to all circles.

In a mixed link, to gain the exponential benefit, the leader of the circle, in this case, the male channeler, must draw on saidin and saidar to make his fireball much more powerful. You're suggesting that merely being linked to a woman is enough to make his saidin more powerful which I completely disagree with.

If he weaves a fireball of 1 saidin, it will remain 1 saidin even in a mixed link. However, if he draws 0.5 saidin and 0.5 saidar - the fireball will have a strength of 2. The combination of the two powers and their repelling-attractive effect is what provides the strength, not the link its self.