Oh come, all ye faithful - S1-E12
Visible crew/equipment: When Charlotte visits the psychic who tells her that she doesn't see marriage, a boom mic moving around is visible at the top middle of the screen, when the psychic is in shot.
Visible crew/equipment: After Stanford tells Derek he's going to be a star, the steadicam operator is reflected on the mirror behind.
Visible crew/equipment: When Stanford and Carrie walk backstage with the models, check the reflection on the glass and you'll see: the boom mic operator, camera and, best of all, a group of technicians crouching on the floor, failing to hide and moving around when Carrie and Stanford walk around.
Visible crew/equipment: When Big arrives at the cafe a moving boom mic is perfectly visible on the glass behind with an arm and a hand moving it.
The turtle and the hare - S1-E9
Visible crew/equipment: While Carrie and Brooke walk down the street, before and after they see Turtletaub the whole filming crew (a man holding a lighting screen, a sound technician wearing headphones and another crew member) plus cranes, tubes and boom mic are reflected on a glass for several seconds.
The turtle and the hare - S1-E9
Visible crew/equipment: Lighting screens reflected on Turtletaub's glasses when Sam says he's got a facial at 3.
The power of female sex - S1-E5
Visible crew/equipment: While having breakfast at the hotel Carrie says "one thing he didn't leave me was his phone number" right then a crew member in red is reflected on the coffee pot, walking around the room.
Visible crew/equipment: When Sam is with the realtor woman, the boom mic is reflected on her sunglasses.
Answer: Yes, it is.