This excerpt taken from the DVN DEF 14A filed Apr 24, 2009.
Changes to Other Programs
In 2008, the Committee reviewed the current vesting period of the SRIP in relation to comparable plans in the marketplace. Based on the market data and the immaterial present value financial impact of the change, the Committee approved an amendment to the SRIP to change the vesting schedule from 10 years to five years.
The Committee made no other material changes to its executive compensation programs in 2008.