However, he has since apologized for this inaccurate prediction and reverted to the initial timescale provided by the company, confirming that the ICS update will not arrive until the end of the 2nd quarter.
He said: "I'm really sorry for this. The rest of the 2011 Xperias will get ICS during late May/early June, which was the timing I mixed up."
The incident comes on the back of similar confusion regarding updates to operating systems in the mobile telecoms world - Samsung missed various deadlines when updating the Galaxy S2 to ICS.
Source: Xperia Blog