User blog comment:Haloprogram/Who do you think is Twilight?/@comment-1808998-20100111050258

Yea if it was Angelus Buffy would already be dead considering the power Angel is packing. The recent issue of Angel shows someone being transplanted with blood, perhaps Angel, and this is how he gets his powers.

Angel always seems to do things for the greater good without anyone telling him off otherwise, i.e. taking over W&H or following Buffy in Sunnydale. So this could be another one of his things believing the First took over Buffy and the new Slayers.