USF1 sporting director Peter Windsor says the Charlotte-based team has continued unabated with its preparations for the 2010 F1 season while most of its rivals have been taking advantage of a festive break.

The American team continues to work on its car for the season ahead and is likely to announce its driver line-up at some point this month; currently being the only outfit yet to name at least one driver for 2010.

While most teams have used the festive period to take a break from plans for this season, but Windsor insisted that only Christmas and New Year's Day had been quiet for his own team with time too valuable to lose ahead of the new season.

"We're all complaining a little about everything closing down for the New Year but - believe me - America is currently much more industrious than the UK," Windsor wrote in his latest blog on the USF1 website. "Here, at our home base, we were quiet on Christmas Day (naturally) and then again today [1 Jan]. The UK - and most of Europe - basically shut down on December 18 and will not stagger back to life until January 4. That's 16 valuable days lost in the too-short life of the F1 European winter."

USF1 will be forced to take time out during the summer when the mandatory break that was brought into play in 2009 comes around again, although Windsor said he found the idea of closing the factory for a month somewhat bizarre.

"Understand that most of Europe closes for August and you kind of understand the decision," he said. "Unless you're American, that is. As in Australia, August for Americans is just another working month in which some people maybe take a week or two away. There's no nationwide shut-down, as such - not of the type that regularly afflicts massive F1 teams like Ferrari. For years all of their suppliers have been shutting their doors for the month of August - and for years the European teams have been complaining that the situation has been growing worse, not better.

There was an F1 team meeting vote in the early fall about whether the 2009 F1 August shut-down had been a "success". I was impressed to hear the McLaren guys say that it was a waste of time and that most of their staff had found it all very frustrating, but sadly these were lone voices: the majority of the teams, led by Red Bull, it seemed to me, are firmly committed to the summer shut-down. And so shut down we will."

Windsor insisted that the new USF1 car is 'growing with every passing day' with electrical components and suspension parts due to fitted to the 'gorgeous' chassis soon.