In reply to Altitude Addict:
Hi I just posted in another similar thread about gloves for MB. I got frost nipped toes in La Sportiva Trango Extremes (the silver ones with insulation) in July last year but it was unusually cold. My girlfriend on the other hand wore Charmoz and had no issues so it is very much down to your physiology!
I generally seem to have slightly poorer circulation than my friends I climb with but despite some very long, very miserable belays in the depths of Scottish winter have never felt the cold like I did on MB. I suspect the altitude and 2hrs sleep under a table might have influenced this a bit too
To try and answer your question I guess it depends on your friends metabolism/physiology and experience in cold climates to date. If he runs warm and has never had issues with cold extremities then the Asolos might be ok.
Iain