Board Thread:General Discussion/@comment-25361324-20150327005747/@comment-25383931-20150327131055

Xilinoc wrote: Yep, Mayuri and Giselle confirmed that Hitsugaya, at the very least, was alive when zombified.

So,according to the Giselle's topic here:

Those who are zombified before death have fresh cells, so they possess better movement and reaction speeds; additionally, they are the only zombies Giselle can completely control, as their personality vanishes in the process.

Toshiro is unfortunately dead,and even if he recovers,he will not be like Toshiro.