This spell does have a pushback value of 1 on Live:
http://lucy.allakhazam.com/spellraw....69&source=Live
pushback 1
Not sure if this is era-appropriate however
For reference, EBolt does have a small knockback associated with it and it has a pushback value of 0.5:
http://lucy.allakhazam.com/spellraw....36&source=Live