The Star wrote: "Arriving about 10 minutes earlier than Dr Koh, who is also the Gerakan president, Guan Eng took his place at the VIP seat right up front. Ever the gentleman, Dr Koh immediately rushed over to where his successor was sitting to shake his hand and pose for pictures upon arrival. While State Gerakan chief and former state Local Government Committee chairman Datuk Dr Teng Hock Nan did not look pleased, Gerakan secretary-general and former Penang Tourism Development and Environment Committee chairman Teng Chang Yeow was his usual chatty self, cracking jokes with those around him."
The New Sunday Times was more diplomatic in its report, saying: "It is a rare moment when two former Penang chief ministers meet up with the current holder of the post.
(I don't know how much of this is true but I've heard that Dr Teng was overheard shouting at the organisers after Guan Eng arrived.)