So I'm getting a 1D III by Saturday. Would a faster card make a difference in how fast the buffer empties?

When I still had the 60D the Sandisk Extreme Pro with 90mb/s card it made a very large difference compared to a 20 or 30mb/s card.

It doesn't seem that expensive to just spring for the 160mb/s Sandisk or Lexar cards. Or would it even matter and just go for a lesser card?