Component class name bindings to reflect before insert?

1

So, I have a component with a className bindings like so

classNameBindings: ['isSpecial:special']

isSpecial: ( ->  
  return true if @get('a') is @get('b')    
).property('a', 'b')

Now the problem is, the class gets added a fraction of second after the element is inserted in DOM, so there is a visual glitch, as special class changes quite a lot of style.

Anyway I can hook into willInsertElement or something similar and update the bindings before its inserted in the DOM?

Thanks!