As Lewis Hamilton settles in at life with Mercedes, it looks like old scores with the McLaren team may not have been settled.

The 28-year-old made the move from McLaren to Mercedes over the winter and a much more relaxed Hamilton has been seen in the paddock this season including the arrival of his dog Roscoe.

Despite having said he will never criticise McLaren after all they did for him bringing him through from his karting days he has admitted he may have "wasted" his best years at McLaren and his chances of adding to his solitary championship win in 2008.

"One (title) is less prestigious now because so many people have won a championship," he is quoted as saying by the Sun newspaper.

"Now the people who have two or three or four, (that is what) makes you special.

"I got to F1 and nearly won in my first year, then I won in my second year but I've never had a car to really compete since then.

"The car makes such a big difference so you're just wasting away your best years," added Hamilton.

Indeed after winning his 2008 championship McLaren suffered a similar downturn to that they are suffering this year, when they were near the back of the grid at the start of the 2009 season when the new regulations came into effect.

While the team recovered and won races toward the end of the season, by this time Red Bull had emerged on the scene and Sebastian Vettel would go on to claim the next three championships.

One of the reasons it is speculated Hamilton made the move from McLaren is due to a fall-out between his long time mentor and McLaren supremo Ron Dennis.

Indeed this week at an event in Cannes, Dennis, while not naming the driver in question, made some comments about a former driver who in his eyes "lost his focus".

"Some people lost sight of what the objective is," he said.

"When you lost sight of what you are doing, then you lost sight of what it takes to be a world champion," Dennis charged.

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