I wouldnt say its true or false. I havnt found any ginseng under pine trees but I know guys that have.... I have found some just down the hillside from heavy pine tho.
I always check out the lower side of laurel thickets and any clearings in between the laurels. Especially on the north facing sides of steep hollows.
However those arent the first things I look for... look for deep hollows or heavy shaded ares with plenty of companion plants. Ginseng can and will fool ya on where it grows. I found a really nice 3 prong growing inside a hollow oak tree on the south facing side of a ridgetop.. no companion plants anywhere around. Conditions were right there and somehow a seed got carried in...
If you look close in this pic you can see a very large 4 prong right in the center of the pic, its growing under the drip edge of several laurels.... there were more than 20 large sang plants within 30 ft of this one.