When visiting friends in the US I usually bring a box with 12 bottles of wine of my friend's family's winery. I only was sent once to customs when I mentioned at immigration the no. of bottles.
Waiting in line for the customs inspection in PHL i was adressed by a customs officer what i have to declare, I told him about the wine. He completely bypassed me of the customs procedure as he mentionend, the few cents are not worth all the hassle and effort of the control.

Usually I'm telling the immigration officers I'm havin wine as a gift with me and look out for some customs people in the luggage area, telling them I have a box full of wine. In this case I've never been sent to inspection.