There is a lot of variability there. I've been told by a LDS that I know that "evolution is a dirty word around my church" yet BYU's biology department teaches evolution and a church pub I read interviewed a BYU biology prof who said that evolution and BBT do not contradict their beliefs and then he went into a whole 'religion and (mainstream) science are friends' discussion. In fact I suspect that the natural science academics at BYU are probably having a large moderating effect on the entire church.
It is clear that so far YECism is not officially proscribed by the LDS church (neither is theistic evolution) but as many of their congregations are taught by laypeople (no professional preachers) Protestant Biblical literalism and therefore YECism is naturally going to infiltrate at least the lower levels of the church on an individual basis. However because the church accepts continuing prophecy a single declaration from their president could turn everything around instantly. Their future position is uncertain.
A similar example is this; you frequently point out that Catholic schools teach evolution, but I know there are some Catholic YECs running around despite this.
[This message has been edited by gene90, 05-18-2002]
™ Version 4.2