Well I've done 2 runs in the Proportion II and so far other than the narrower toe box (compared to Asics 2130)
I have to say that these shoes feel lighter, although they are a little heavier than the 2130's.
They feel lower in the heel and more minimalistic, kind of an in between shoe (between the 2130 and a racing flat, Asics Piranha)
I like them and wil continue to put them into the rotation, and increase the distance in them, so far they were good for 6 miles.

Update: I did a 17 mile run in these shoes today and I have to say that are really surprising me!
They make you run light, which eases the pounding your legs take. At mile 9 after an uphill climb it felt like I was floating...all in all I'm quite happy with my $60 shoes