As for the girls optionals, I've seen them compete yurchenko in 8 besides tsuks. However, there are a lot of BAD yurchenkos and tsuks. Good enough so they don't hit the back of their head under the table as they rotate over. Well good enough by a near miss. Personally, I'm of the opinion unless they're GOOD, then you should train them but not compete them vs throwing them. Too many skills get thrown in optionals ( back giants and layouts ). In optionals levels of 8 and 9 you won't seem them really turn over off the table and it get's hairy from there. Ugh.
At first I never liked yurchenko, but I've come to enjoy it more now that they are running full bore into it. I think I will be nostalgic and favor Tsuks and front handspring vaults ( ever see front handspring entry? ). I'm not a fan of Kasamatsu really. I love side summis but they just seem half-arsed.