It all depends on sets and lofts too. There are a few sets out there that have the 5 iron the exact same loft as my 4 iron. With my current set I would need wind or downhill to hit 200 with 5 iron its more 185-190 on normal conditions. some of the new "distance sets" have 23 or 24* 5 iron !
Valid point. My 5I is 27* and it's my 180-185 club. Still need to work on my ball striking with my irons though.