I was actually pretty off about those venues being small. Most of them hold about 2,000 people. But I think they are at a weird point where they could either do places around that capacity for 2 nights and sell out both nights or play venues that hold 5k-6k people and be a little under selling out the venue. I imagine they'll be headlining places like Royal Albert Hall within the next year.
Still seems odd after doing two nights at Brixton Academy and them both being extremely well sold/sold out. 10,000 people. I agree they will probably play somewhere like that come the end of 2013