This one is provoked by RRMike's report on his Byzhighexpert campaign where he expressed his desire to conquer trebizond asap to get access to V1 Treb archers (if I had the same conquering strategy in mind I would justify the same move by the desire to get Treb governor's office which adds 1 star to the governor in question, though). So I thought: is it worthwhile to try to get a higher-valor ranged unit (especially for the Byz)?
Well, the UNIT GUIDE says: "Where ever possible place your naptha throwers on higher ground than their targets, this increases their range and keeps them safer. Also try to get them valour as quickly as possible; it increases their accuracy tremendously." I presume it rules for all ranged units as well.
When we speak of the Treb archers issue, I don't think valor matters much (even if it does increase accuracy). We must bear in mind multi-star Byz generals. If your general has, say, eight stars who cares if your archers will have valor 4 or 5? It is of no great moment whether it will make them more accurate or more stalwart in melee (if you plan to use them that way).
But some people here expressed their doubts as to the correlation of valor and accuracy. So I would like an explicit answer to the question: Does more valor mean more accurate shooting?