The flare will allow the ball to contact a fresh surface on each revolution so when the ball does hit the dry part of the lane it will be fresh ball surface on dry lane allowing for a stronger hook , sharper angle, and greater change of direction.
Some people say that after a certain amount of flare separation that it doesn't provide any more advantage..
I have heard other people say that with the larger separation that where the track meets at the bowtie will a smaller point and therefore have the ball roll over less surface where there is oil.. and have more fresh surface on the lane..
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18 mph,350 rpm,PAP 5 1/2 x 3/8up, 10-13 deg axis tilt, varied rotational axis deg.. usually 45+
HighGame 300 x 5, High Series 808
Book Average 220,PBA Xperience 193