I'm far from being an apologist for CDG security, but the rules *are* different. IMO initial screening process is almost delightful compared to TSA but they're more thorough at the gate if you get selected.
I do 30+ trips a year out of CDG - mostly to the US and Asia - and my personal recommendations are:
- Don't be one of the first three people to the gate; don't rush by if you're last to the gate either as it raises suspicions.
- Don't exceed liquid limits and don't open plastic bags from Duty Free (surprisingly common).
- Don't carry unmarked anything - including powders.
- Do be polite. The French have a thing for politeness and they're happy to make your life miserable around the language barrier if one is an a**.