The total number of passengers and crew can vary, but the maximum number of passengers that can be onboard (including third and fourth berths) is 3,056, and the maximum number of crew is about 1,254. So, the Queen can carry a maximum of 4,310 passengers and crew. The Queen Mary 2 is equipped with 22 Schat-Harding lifeboats, each with a capacity of 150. As well as 2 Norsafe rescue boats, each with a capacity of 6. The ship also carries 60 Zodiac davit launched life rafts, each of which can hold 37 people. So, the lifeboats can hold 3,300 people, the rescue boats can hold 12, and the Zodiacs can hold 2,220. Altogether, the QM2 has a lifesaving capacity of 5,532, or more than 128% of the total number of passengers and crew onboard.
So, although there are enough lifeboats for all of the passengers, the vast majority of the crew would need to use the rafts (depending on how many passengers happened to be onboard at the time).