Per SECXBRL.info 20% of the DOW 30 companies pass 100% of the fundamental accounting concept validation rules. See the list here.
Of the 6 reporting entities which pass all of these validation criteria (DUPONT, 3M, Intel, GE, Microsoft, Cisco), two pass all for the first time in 2013 (DUPONT and Cisco). You can see a comparison for 2011, 2012, and 2013 validation results here.
Half of the DOW 30 passes 90% or more of the fundamental accounting concept validation criteria.