1.052 to 1.005 is close to 90% attenuation, which I would think is done. Only 2 gravity readings taken 2 or more days apart can confirm this though since it's impossible to predict what your exact attenuation will be. Many brewers (usually newer) want a specific number of days to plan when to transfer, bottle or keg. Experienced brewers know that even the best estimate is a guess and can vary quite a bit. As I've said on many posts, the most important thing for any brewer to learn is patience. A week can make a HUGE difference on the too early side of things. When your brew is done, an extra week (or even several) will never be a problem.