My neighbor Airbus captain swears their procedure with loss of IAS is max climb power and 5 degrees nose up and laughed because I have 8 jet type ratings and have never been taught that. I said 5 degrees nose up at 35,000 ft means you will eventually stall and go through the altitudes above you belonging to other flights. He says I wouldn't be following the Airbus checklist and laughed some more. With a good altimiter do all Airbus pilots fly like that? We were taught to hold last attitude and power and use the UAS checklist in all 8 jets I was a captain in. With a good altimiter with AP disconnect I wouldn't even call it a big emergency but to fly through unauthorized altitudes would be. This is at least Spirit Airlines procedure.