AGM as a part of Sempervium name

Sometimes I see (Wrongly) written Sempervivum names with AGM as a part of their name.

WHat is AGM? Award of Garden Merit by the The Royal Horticultural Society's is supposed to help gardeners make informed choices about plants. This award indicates that the plant is recommended by the RHS.

More on this:
http://www.rhs.org.uk/plants/agm2.asp

Semperevivums with AGM are:
Sempervivum arachnoideum 1993
Sempervivum arachnoideum L. subsp. tomentosum (C.B. Lehm. & Schnittsp.) Schinz & Thell. 1993
Sempervivum ciliosum 1993
Sempervivum 'Commander Hay' 1993
Sempervivum tectorum 1993

In May 2009 a 'supplement' of The Royal Horticultural Society AGM Lists also conferred awards on these sempervivums:

S. cv. 'Bronco'
S. calcareum cv. 'Extra'
S. calcareum from Guillaumes
S. calcareum cv. 'Sir William Lawrence'
S. cv. 'Crispyn'
S. cv. 'Delta'
S. cv. 'Fuego'
S. cv. 'Gallivarda'
S. giuseppii
S. cv. 'Jet Stream'
S. cv. 'Lilac Time'
S. cv. 'Othello'
S. pittonii
S. cv. 'Reinhard'
S. cv. 'Rotkopf'
S. cv. 'Spider's Lair'
S. tectorum cv. 'Royanum'
S. cv. 'Tristesse'