I want to echo a lot of the comments made here. I was thoroughly hooked on LR right from the start (partly because of a shoot in Iceland with Thomas Knoll). We were both Canon shooters back then. When I moved to MFDB I continued with the "comfortable" LR.
Then last year I was on a shoot with Kevin Raber of Phase One and happened to see his files, both Canon and Phase, shot at the same time as mine, on C1. Wow - they made my LR files look muddy. So, as others have said, I decided I'd better invest some time in truly learning C1. I'm still no expert but my files are way better "out of the box".
And Sony files at anything but ISO 200 need C1.
Having said all that, I still use LR for slideshows (of which I do a lot) and the web. It is definitely more intuitive than C1 and of course its grad filter and retouching capabilities alone are very worthwhile.
We are fortunate to have two such great products to use, each for its own strengths.
My last echo is to (vehemently!) agree this is the most well-informed and courteous site for discussions. I learn something new every day from each of you.
Bill