5600, well it is better than Krieg 5000 crew and 50 ships that being sunk by mihawk.. :)
Of course straw hat pirates quality is way better than Krieg, however I still can not see Luffy as a Yonkou yet. But close..
If in the next chapter all of his hidden allies (Jinbei, the Amazon, Skypeans) suddenly announced their allegiances, it is settled then.