Sebastian Vettel believes that Mercedes' level of dominance currently in Formula 1 is perhaps unprecedented and greater even than his run of four consecutive titles at Red Bull between 2010-2013.
"Honestly, we never had that level of domination," the German told the Spanish sports daily Marca.
"The first year I won by a few points only to Fernando, Mark and Lewis. And then in 2012, the first seven races had seven different winners. That's very different to what we have now."
"The rules are not changing much for next year and it is likely that Mercedes will be very strong again," said Vettel.
F1 legend Alain Prost has a simiar view in an interview with Bild newspaper, "Mercedes will continue to be strong next year. Ferrari will move closer again, but I see Mercedes in front of them, and then Red Bull."
Red Bull's Daniel Ricciardo agrees that Mercedes may be too big a challenge for its main rivals in 2016, telling Perth Now that he thinks the German camp actually "increased the gap this year".
"I don't want to get too excited," said the Australian. "Obviously I probably set too high expectations at the start of the year, so I think the next goal is to play it down and see what happens."