Consider this: a screenshot of a single Recount of a single boss fight. Consider it the "in practice, biopsy-style" theorycraft, taking a single slice of a fight rather than a whole night of fights smushed together.
Incinerate: 50 casts, 302930 total damage.
Cast time: 1.93.
DPCT OF INCINERATE: 302930 dmg / 96.5 (total time spent casting) = 3139 DPCT
Corruption: 56 ticks, 44599 total damage.
Cast time: 1.35 (hasted GCD)
56 ticks, since Corruption has six ticks per cast, is 10 casts with four missing ticks.
44599 (damage) / 56 (number of ticks) = 796 (average damage per tick)
44599 + 4 * (796) = 47783 (amount of damage those ten casts should have done in total)
DPCT OF CORRUPTION: 47783 dmg / 13.5 (total time spent casting) = 3539 DPCT
Thank you for playing. I do Bar Mitzvahs.
1.) That does include Imp Corr, which I have. Nevertheless, the DPCT is remarkably higher and would at worst even out untalented.
2.) The Incinerate damage is including whatever it gained from the Molten Core uptime it wouldn't have had without Corr being up.