No one has mentioned the compound of the tyre or the road surface - both factors that would impact skid far more than 1 degree of head tube angle or 1 inch of top tube length. At the end of your day just decide you are going to do it, and do it.
+1 slick Schwalbe Ultremo grip way more than treaded Rubino Pro and them non-skid surfaces laid in front of most junctions in town do what they say on the tin.
+1 slick Schwalbe Ultremo grip way more than treaded Rubino Pro and them non-skid surfaces laid in front of most junctions in town do what they say on the tin.