Yes, he was cryopreserved.
On the plus side, knowing your own death is coming and being at a hospital already gives the best chances for cryopreserving the brain before it begins to degrade. You can get a "standby" watch as the time approaches.
On the minus side, ALS is a neurological disease. It affects the motor neurons, not the ones responsible for cognition, but that includes the "upper" motor neurons... including the ones in the brain.
Maybe we'll be able to repair ALS-damaged neurons before we figure out how to safely reverse cryopreservation. Maybe we won't, but life support systems will be good enough it'll be worth bringing him out anyhow. Maybe we'll achieve brain uploading and ALS will be irrelevant. Any which way you look at it, though, he's going to need some work.
That's actually one of the (many) problems with cryopreservation research. We can't bring people out of full suspension right now, so cryopreserving a living person is legally considered killing them. Thus, it can only be done to people already legally dead. Legally dead people tend to have died *of* something. There just isn't any point to bringing people out of cryonics until we can repair (or replace) their bodies.