I don't really understand why USPD's are so attracted to using heavy cruiser style motorcycles for traffic work. I was one of the riders that was involved in trialling the HD Electra Glide in the NSWPF. It was more of a promotional opportunity for HD as we never considered the HD motorcycle as a viable option for HWP duties. The HD was too heavy, high speed handling was terrible, brakes....errr what brakes and it was hugely under powered....I was glad to give it back!
Most bikes will perform well in a low speed environment if the rider has the proper training and skill level. I'm guessing that the use of cruisers for traffic work in the USA is something more strongly steeped in tradition than otherwise mentioned. I think the real winner here is Victory as the public will see police use of their bike as a glowing endorsement for their product.
Cheers,
Tony