In my experience we can rule out all the Indians ($2 1/2 & $5) as strike-thrus are not common on these. I look at a lot of different coins and that's why I believe this defect is fairly common - the bigger and more interesting the debris the better.
I disagree, the coin is a minor error: struck thru. It will ALWAYS be an error NO MATTER HOW WORN OR BEAT UP. Depending on the grading service, it will get holdered as a "struck thru" error if requested and paid for. At least one major TPGS will note "struck thru" on label at no extra charge whether the owner noticed it or not. As to a details grade, my opinion is still YES.
In my opinion the evidence is sufficient to consider it a genuine strikethrough. A postmint artifact would not be of such regular width throughout, showing no displaced metal (yes, I understand circulation could ameliorate this), but most importantly it continues right up and into a star. It would be near-impossible to create something like that postmint without affecting the star. So it's a strikethrough in my book. I don't know if it'd be automatically referenced on the slab (NGC does this: http://boards.collectors-society.com/ubbthreads.php?ubb=showflat&Number=7801667 ), not being particularly significant, but certainly worth mentioning in any writeup related to liquidation, when the time comes.