I don't know if anyone else watched the game in question yesterday, but it is interesting to note the referals had a 0% succsess rate (ie the 3rd umpire agreed with the on field one) and that the first one (Chris Adams given out lbw) was a marginal one - I've got a feeling (though you can't judge after one match) that the 3rd umpire wil back his on field colleagues if the decision is marginal and only if it is blatantly wrong (like the inside edge lbw in the SL-NZ WC SF) will it be reversed. I think they are limiting it to two wrong referrals per team per innings to stop players appealing against it EVERY time (as they said on Sky, some bowlers think its lbw every time the ball hits the pad)