Luckily I had 5920 last night on the Bx9....I noticed that acceleration is much more smoother (slower ). However, there is no chatter when coming to a complete stop like the 577x's. All in all I prefer the 59xx series.
Looks like it...and it's ahead of schedule as well.
5936-5967 – West Farms (31) (Aug-Oct 2012)
Replace EOL Buses & Send Earlier Allotment to Kingsbridge