I think Zak's simplified, back-to-basics drumming suits Oasis now, but wouldn't have done in the early days. I reckon it makes the band seem like they're matured over the years - songs like Acquiesce and Wonderwall had been played reasonably fast live up until Alan was replaced, now Zak plays them at more or less the same speed as the album versions. Perhaps I'm reading too much into it all, but what do you think?