I always thought all attacks were boosted, but now I'm not so sure. I was using a fire great schythe +5 earlier and my attacks seemed unaffected. Or at least my AR didn't reflect a change. I tested this on an enchanted broadsword +7 and the AR clearly reflected a change. The only reason I can see this happening is because of scaling. Maybe it is that weapons affected by scaling are boosted, otherwise AR stays the same?
An insight is appreciated!