Thus far, the consensus seems to be split around even, with Ichigo leading slightly. Some people are saying Ichigo would blitz Zoro with his speed, while others are saying that Zoro has proven himself to be hypersonic by dodging Kuma's air pressure. Personally, I think that Zoro would be kind of hard pressed to hit Bankai Ichigo.
It seems the debates are not about whether or not Zoro could tank Ichigo's attacks so much as whether or not he could hit Ichigo before he took enough cumulative damage to be unable to continue. Ichigo's speed seems to be the deciding factor. While Zoro may not be as fast, his AoE attacks like the Tatsu Maki ought to be able to offer him fairly good defense and offense against Ichigo's speed onslaught. In my opinion, anyway.