This is 1-2-1: –
The seat plan for the above aircraft confirms only 4 columns of seats – A, D, F and K. For me 1-2-1 does not mean 2-4-2 but staggered 1-2-1, where the next column of seats is half a length offset, does.
A certain airline that uses the same layout as the new EADS seat, not the same seat but very similar, has a seat plan with columns A, B, D, E, F, G, J and K. I count 8, I don’t know how you count, but I’ve got 8.
The CX seat is basically 1-2-1, but space is saved by angling the seats in what’s called a reverse herringbone layout. The seat plan confirms 4 columns – A, D, G, and K. It should be noted that BA squeeze in 56 seats in the same space where CX have 45, so more seats to sell. However I know what seat I prefer, and would be prepared to pay more, so CX should get a higher yield.