Give this article a read. It covers your real options for getting to a better image on the TV. Real tangible results. The only real path to better viewing.
A summary is:
1. Get a test disc and follow the instructions. (free-$40) If you follow the instructions correctly ... things get better ... if you don't ... well.
2. Get hardware and software along with the test disc and learn how to do all this yourself. Spend the next year scrounging around on the net looking for info. You might get to a better picture eventually. ($150-$500) Just like buying a pro camera does not mean you suddenly take professional level pictures. Learning not included when you buy a hammer.
3. Hire a good professional to calibrate your TV and you get to the best end result in about 3-4 hours. ($250-$450) If you hire a bad one ... well who knows what you end up with. This is not unique to the world of calibration ...
4. Get professional level training along with the hardware and software. Training can cost ($100-$2000) and paying more does not guarantee you get better training. Add this to the hardware and software costs. You can actually get pretty damn good training for as little as $100 ...
This article discusses the real odds that you are facing when you decide to copy settings. And that is what you are asking anyway.
Summary .. you have less than 4% chance to do better than stock settings in the TV. That said ... you have a greater than 96% chance of doing no better or worse than the same stock settings. But since you can never verify without gear and knowledge if you are truly in the 4% or 96% group ... the stats don't matter and it is simply a game to find settings you like ... liking .. doesn't make it correct ... 2+2=98 ... I can like that a whole lot, but it is still wrong. You just swap out one type of wrong answer for another one since the correct answer does not matter to you.
If verification is not important to you, then you are no longer talking about calibration ... and why are you in a calibration forum ...?