It doesnt show but when i check my total XP i think its doubled. As usually I could just put down an lucky egg and jump into the raid then quicky run into the next one. Per lucky egg I usually could do 2 raids and earn about 50,000XP I think with catching spinning hatcing non stop as well. Sometimes I could do 3 raids when the gyms are super close and earn more than 60,000 XP which is great! Im not 100% sure but I believe it does double the XP otherwise My XP bar wouldnt gain that much.