Interesting topic. In polite company in the US, you're supposed to use the European method, tines down. But nobody really cares these days. Hand in the lap for soup courses, and you collect soup on the spoon by moving it away from you, not toward. You can of course put the silverware down, you don't have to hold them all the time. After all, you are supposed to chit chat with your neighbors and dab your mouth with the napkin periodically, and you can't do that while actually eating.
The Germans seem fond of scraping utensils against each other to scrape off extra food: a big no-no. The way I was taught, that's never supposed to happen because you never actually deeply immerse them in the food, just the lower 30% or so. I don't remember what we had to do with peas, but I remember we were encouraged to leave a polite amount of food on our plates, to avoid scraping up the remainders and generally making a mess of things. I remember being told that the plate is not a canvas for modern art, so don't chase your food around the plate. Or something along those lines.
Oh also, a lot of people bend over their plates, in "ME HUNGRY" position. If you do that and you have a fancy business dinner coming up, practice not doing that.
