In reply to Michael Gordon:
> As far as I can tell the H grade is only of use in the following two cases:
> (a) a route has a hard to spot sequence so making the onsight very difficult for the grade given. Rather than having two grades next to the route description maybe just put something to that effect in the description?
I think the idea is more that, initially, when a route has only been climbed in a headpoint style ascent, it is given a H-grade alone. This is because no one can really understand what it will be like to onsight, and so cannot correctly give it an E-grade, because that's for an onsight ascent only. Then, as standards improve and people get stronger and bolder, someone will eventually onsight it, and will then be able to provide an E-grade.
> (b) a route is thought to be impossible to onsight. Given that it will probably get E10 or something and no-one will consider attempting it onsight anyway, does it really matter?
It does matter! There are loads of routes out there below E10, particularly on grit, which no one would think to onsight for all sorts of reasons. If you imagine a hypothetical route with no protection apart from a bomber placement really specialist bit of kit that no one has on their standard rack, just below the crux at 10m. And then this crux invloves a blind reach to a hidden hold, say a tech 6c move. With headpoint practice, this route would be a well protected, knacky 6c move, making it around H6 or H7 6c. Onsight, this would be a blind 6c move above a death fall, making it E10 6c! Which is a big difference.
Obviously I've exaggerated this situation to prove a point but you can see why it would help.
Whether it is through a H-grade, or through an additional sport grade in brackets (maybe a boulder grade for the little grit routes), something needs sorting out!
I also agree with the point above about the technical grade - I never understand why we don't just revert to using a font bouldering grade to describe the hardest move, particularly when you get to around 6c/7a. Aside from tradition, of course.