No I don't. In fact a 1st life 14/4/2 wf shiradi caster with a little epic exp (enough to twist in energy burst and two tier 1) and mediocre gear will perform essentially at the same level (provided same knowlege of quest and player skill does not matter much at all)
In fact, shiradi casters require little player investment and it is too accessible yet too powerful compared to other casters. That is another issue with it.