Regardless, the point is tie them carefully...I particularly like the palomar because there's not a lot of line to move/twist when you tie it. Friction when tying is a huge knot killer. Any of the popular knots will work provided you do it properly, I'll stick to the palomar.
I know how it works on lines . Flouro doesn't absorb water like mono/copoly does...So in essence what you are doing is simply lubricating your flouro with L&L. Maybe that helps some people? On mono it absorbs into the line and makes it more manageable (incidentally, you can get the same effect by soaking it in water, AKA fishing with it for a few dozen casts). For the record, I've used it...I didn't find any changes on flouro.
For the OP and anyone else interested, I found this article a while ago to be very interesting. It's good breakdown of mono/flouro from a somewhat scientific standpoint. The whole article is a good read and related to this discussion, but for what we are talking about here, pay close attention the paragraph on Water Absorption .
http://www.bigindianabass.com/big_indiana_bass/the-truth-about-fluorocarbon.html
(I'm not affiliated in anyway with this site, just found it on the net and bookmarked it)
You obviously have a different opinion than me, that's OK. Like I've said multiple times, don't let me stop you! Someone reading this thread can look at all the information and make their own decision on what to try/not try. No such thing as too much information. The biggest mistake you can make is thinking you've already learned everything.
A lot of fisherman stay away from fluoro because of talk like this...Where people say you NEED to buy 'quality' AKA expensive line, treat it with magical spray, tie the special knot, etc, etc, etc, ......I like to point out that it's really much simpler than that.
Buy flouro. Spool it up. Cast a few times and adjust your methods if you have trouble. Catch fish. Retie/replace as needed.