Stevens rearrangement solvation

Heard, G. L., Yates, B. F. Hybrid supermolecule-polarizable continuum approach to solvation application to the mechanism of the Stevens rearrangement. J. Comput. Chem. 1996, 17, 1444-1452. 

In the Stevens rearrangement below, would you expect product (A) or product (B) to be favored by increasing the electron affinity (solvating power) of the solvent Explain your answer. 

Figure 11 PM3 optimized geometries of clusters of six solvating acetonitrile molecules surrounding the ylide (a) and concerted transition structure (b) of Stevens rearrangement 4...

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