Update: Adobe has confirmed in an SEC filing that Lynch departed the firm. He left the company yesterday (March 18) to pursue other opportunities:
On March 18, 2013, Kevin Lynch resigned from his position as Executive Vice President, Chief Technology Officer, of Adobe Systems Incorporated, effective March 22, 2013, to pursue other opportunities.
Kevin Lynch, Adobe CTO, is leaving the company effective March 22 to take a position at Apple. We will not be replacing the CTO position; responsibility for technology development lies with our business unit heads under the leadership of Adobe CEO Shantanu Narayen. Bryan Lamkin, who has recently returned to Adobe, will assume responsibilities for cross company research and technology initiatives as well as Corporate Development. We wish Kevin well in this new chapter of his career.
Apple has confirmed the move. Apple says Lynch will report to Bob Mansfield, SVP of Technologies (chips/wireless).