Thinner gluelines are better for minimizing the effect because there's
less bulk material there. Which is why higher clamping pressure is
_a_good_thing_ (tm) besides the empirical observation from testing that
it improves ultimate joint bond strength.

--

"Fine Woodworking" magazine did a clamping pressure vs. strength test
some years ago and found that in almost all case, more pressure was
better. Reading that article changed my clamping life and my joints are
much better than they used to be.