I had a phone interview. I talked with a group of engineers in the group I was applying for. They asked fairly standard questions and were fairly opaque about exactly what they wanted from me. I followed up with a programming problem given via email. The problem given was fairly simple. I ended up having a positive impression of the group.
They asked a bunch of standard questions. Not many surprises.
The following metrics were computed from 1 interview experience for the Blizzard Engineering role.
Blizzard's interview process for their Engineering roles is extremely selective, failing the vast majority of engineers.
Candidates reported having very good feelings for Blizzard's Engineering interview process.