Worse than carharts? Yes, I have seen hunters in Carharts with a tiny orange vest over top.
I know how well I can see blaze orange in the bush, we use it for anything big game and small game when we hunt in a group. Archery no, waterfowl no, turkey no, but when there are 20-25 hunters per 100 acre farm bush, ya, I like to have it on.
I would not hunt in a situation where there are 20-25 hunters on a 100 acre farm. To me, 1 or 2 hunters on a 160 acre parcel is plenty.