Flash on D or F theory

Upon reading the recent Poll that about 50/50 players use on F or D. I have come to a recent conclusion that players who use F for primarily rest their index on R (Pinkie finger on Q, Ring on W, Middle on E, and Index on R). Where as D flashers rest their finger on E (Pinkie finger N/A, Ring on Q, Middle on W, Index on E)

To take a quick poll to see if my theory hold water at all, would be appreciated.