Don´t know how I found this thread but since I´m located in Sweden where Cardento spent a long time I could give you some info. you have to forgive me if my english sometimes fail me.
We have loads of Cardento offsprings here and one thing they have in common is that they sure can jump. They are also (normally) an easy ride. So if Cardento had issues I´m pretty sure the offsprings are not normally that way. We have a youngster tour that ends up with finals in Falsterbo Horse Show and a lot of amateur riders ride their own horses. Last year a “Sire Competition” started in Falsterbo counting the 5-7 yr finals and for two years consecutive, Cardento has been the best sire.
When it comes to size it seems to go both ways. Lot´s of offsprings suiting girls but also the other kind.
This one came in 4th in the 5yr final (1,25m) with a junior rider last year in the finals:
http://s3.amazonaws.com/equipe_webshop_pictures/photos/110686/_TZ10060_preview.JPG
More info on the above horse:
http://www.blup.se/en-US/horses/159039-era-af-ostra-hult-f-2swb
The 7yr winner (1,40m) this year was also by Cardento, although ridden by a pro (Malin Baryard-Johnson):
http://webshop.equipe.nu/meetings/1142/photos?q=cisco#
More info:
http://www.blup.se/en-US/horses/201478-cisco-swb
Here´s another although in the states now, Cadence (Michelle Spadone rode him in VCfinal 2010):
http://s3.amazonaws.com/equipe_webshop_pictures/photos/107064/20090704-_DSC2081_preview.jpg
More info:
http://www.blup.se/en-US/horses/134771-cadence-swb
And here´s a link to last years breeders (6yr finals 1,35m) with a few Cardento offspring… click the filmstrip to watch…
http://online.equipe.nu/sv-SE/class_sections/3964/results
OT: Fun to know: Number 5 Cisco is the same horse as above (now in VCrider Malin B-J stables), Number 13 Willem is now in Beat Mändlis stables and nr 31 Causa Rei in Jessica Kuertens… might be more of them but these three definite.