Following spells in charge of Norwegian clubs Lillestrxm, Viking and Molde, ex-East Germany striker Rosler took the reigns at Brentford this summer.
The Bees are currently five points outside the League One top six and are due to continue their play-off push against Dickov's Latics this weekend, if the Griffin Park pitch can withstand sub-zero temperatures.
"It's not taken me by surprise at all," said Dickov. "He was always passionate about his football and always telling you what he thought about it.
"He wasn't scared to voice his opinion either. He wasn't always right - it usually depended on whether he's scored or not!
"I think people look at him and think he's a relatively young, inexperienced manager, but he managed at the top level in Norway for a number of years before he came over here. He's kept in touch with the English game as well. He was always over at games even when he was managing over there."
