Deadly throw interrupt is still delayed on the outland server, instead of interrupting when the spell is cast, it interrupts when the projectile hits, listed as fixed on bugtracker and dismissed by bigpwn when I reposted the bug as it still exists. For proof of how it should work just check this arena game from neilyo 14. https://youtu.be/fT_aZfg9AP0?t=3m51s as you can see his DT interrupts when he casts the spell, here it interrupts when the spell hits.