As fake as it gets.
Two things in particular that I noticed:
1. The "enemy fire" as they got off the rafts. Do they really expect us to believe that they would be shooting at these "stars"? Or that the "stars" would be ok with being shot at? And where, exactly, were these supposed bullets coming from?
2. Fake grenades. When you fire a grenade and miss your target, the grenade still explodes. But yet when each team missed the tower with their first shots... silence.
Did anybody else notice anything else that further proves how fake this show is?