With war caster when does the spell take place?

@JeremyECrawford with war caster when does the spell take place? The same as oa or different?

— Keith Martin (@kam2112) February 1, 2016

War Caster: the spell you cast in place of an opportunity attack has the same timing as an opportunity attack. #DnD https://t.co/Uiug5jEBQ8

— Jeremy Crawford (@JeremyECrawford) February 1, 2016