I was curious to see how various stallions are producing for dressage, and to see where Frits' bloodlines ended up: Rypke is the 4th ranked Sire and Tsjalling is the #1 ranked dam's sire!  I guess he's got the right "stuff" :)  Klass is a Jurjen x Tamme, both who ranked quite well in here, too!

I took the FHANA USDF All Breeds results from 2003-2005 plus the results from the FHS for 2005.  I looked up their sires and dam's sires and here is what I found (the number indicates # of offspring listed in All Breeds Awards):

Sire Dam's Sire   Flat ranking of Dam's Sire
Jillis 4 2   Tsjalling 7
Feitse 4 1   Naen 5
Lukas 4     Hearke 4
Rypke 4     Lammert 4
Jurjen 3 2   Tjimme 4
Laes 3 2   Oege 3
Anton 3     Reitse 3
Leffert 3     Tamme 3
Ulke 3     Barteld 2
Reitse 2 3   Bendert 2
Lute 2 1   Daen 2
Brandus 2     Doeke 2
Krist 2     Falke 2
Nykle 2     Franke 2
Olof 2     Jelmer 2
Sjaard 2     Jillis 2
Tsjerk 2     Jurjen 2
Tjimme 1 4   Laes 2
Oege 1 3   Bouwe 1
Bendert 1 2   Cobus 1
Jelmer 1 2   Dagho 1
Frans 1 1   Diedert 1
Oltman 1 1   Dimer 1
Abe 1     Feitse 1
Abel 1     Frans 1
Bearend 1     Gaiije 1
Djurre 1     Gerlof 1
Erik 1     Jochem 1
Fabe 1     Keimpe 1
Ids 1     Lute 1
Jakob 1     Marko 1
Jildert 1     Meier 1
Ludse 1     Nikolaas 1
Nammen 1     Oltman 1
Peke 1     Pike 1
Pilgrim 1     Piter 1
Sander 1     Remmelt 1
Teunis 1     Ritske 1
Wicher 1     Ubele 1