But is their telephone advice etc helpful (and do they charge loads)? I think they're the modern version of NAGC in the UK - but the website has an air of 'out to fleece parents who think their pfb is a genius'. I'm hoping this is unfair, and they just farmed out the web design to someone insufficiently gifted in that area 
For reference, dd is 11, having a lot of problems in school, we could possibly do with a bit of external support & advice. Its very hard to disentangle to what extent her issues are related to potential 'HLP'/giftedness, and I think DH & I have never really thought about it in this way. However, a couple of years back when she saw the ed psych, she was assessed on all the various verbal/non verbal reasoning tests as falling in the 99% / 99%+ percentile.
The bits I've read on the Potential Plus website about asynchronous development / hypersensitivity / perfectionism also all strike a real chord.
Actually, I'm also struggling with all of this really because my mum used to volunteer with NAGC as it then was back in the 70s and was pretty vocal about how generally the dc with problems actually just had barking parents . . .
I've namechanged (but haven't posted on G&T before anyway, mainly stick to the safe havens of Fiction & Chat) because I don't want to discuss dd in the wilds of t'internet anywhere she's likely to spot it!