2 lockouts per week
10-25 separate lockouts.
This means in this same amount of time, they've ran 10 and 25 probably 6 times each. 25 man does have bosses that are 10% stronger, but they beat it in 10 man with the upgraded 25 man gear (which is quite a bit higher in ilvl in Asia). I'll count this as a feat when wearing heroic gear to beat normal becomes a feat.