Hi Chris,
I think you're right, I've heard it said before about the 250. When my cylinder head was getting replaced at 60000 miles, I had a lend of a CT200h and I really liked it. TBH, I didn't like the look and it wasn't very quick in a straight line but the drive and tech were fantastic, so credit where credit is due.
I've emailed Lexus UK with a nicely worded note about my issues with the car and list of things that have gone wrong on it. Bearing in mind that the car had 27k on it when I bought it, it now only has 74k miles on it and I've had the cylinder head, clutch, fly wheel, bearings, egr valve, engine map, injectors, alloys (twice) all replaced, I think it's fair to say I have a strong case for being annoyed with it. It's a fair list to go wrong for 50k miles of motoring and not what you'd expect from a quality brand like Lexus.
I await their reply and hopefully I'll get one.... if the reader does't fall asleep before the end of my email! ;)