Not entirely sure where Globalti gets his info from, but at 13.5 stone whilst not Giant Haystacks I am not Alberto Contador either. The Superstars use standard Sapim spokes standard bearings and bomb proof 30mm rims. Racing on them I have hit pot holes at speed and they have been fine.
I have nothing against Mavic wheels, I have had a set, but for a set the same weight as the Superstars they are three times the price. They are also a lot harder to get parts for when they are a couple of years old, whilst Sapim spokes are held by most decent bikeshops.
I have never seen a Superstars wheel so I can only guess about it.
Bearing in mind they only use 24 sapin spokes I doubt very much they are as strong as Mavic ksyrium at similar weight.
From what I hear about them is that for reasonably light riders the Superstarts are hard to beat on price.
I don't know what hubs they use but I hear the superstarts hubs use very small bearings and those have a short life.... TBH for racing that is not such a big deal..... if you are training or doing high mileage it might be a pain.... it's not like you are changing bearings every week either.
The rim for me is a mistery.... from experience I know good quality rims that are also light and strong cost a lot of money. So I really need to see a rim to form an opinion.
On the other hand, I have rebuilt a few Ksyrium so I know the individual components.
The rims are of excellent quality, light and very strong. Expensive too, over £100 each.
Spokes are light and strong too. The way they fit to the hub and the rim might contribute to longer life.... that's my opinion but I might be wrong.
They are a little heavier than Sapin spokes but I'd rather have 20 of those than 20 Sapin on my rear wheel ; (
The hubs, as expected, are light and I understand they are pretty reliable too.
My view is that the ksyrium are very strong wheels for their weights. They also cost 3 times the money.
At 15.5st I wouldn't be afraid to ride a set of ksyrium.
It makes sense, if your weight allows it, race on anything that is easier / cheaper to fix / replace if something goes wrong.