When the WIAA Representative Assembly voted on adding the boys' shot clock in April they had the choice of either 30 or 35 seconds. They decided to do the 35-sec. shot clock.
http://wiaa.com/ConDocs/Con133/Shot%...Rules%20_2.pdf
The only thing to me that doesn't make much sense is that the girls don't have the 10-sec. BC count with the 30-sec. shot clock, yet the boys still have the 10-sec. BC count with the 35-sec. shot clock.
Speaking of the 10-sec. BC count, watching the Girls' games at the 2009 T-Mobile Invitational national high school basketball tournament, since neither the girls or boys here use the shot clock, the girls had the 10-sec. BC count, as well as the boys.