printing to BR-Script using CUPS with generic postscript driver

[Andrew Gould]

I'm considering the purchase of a Brother laser jet printer (HL5470DW or
HL6180DW).  According to the specifications, the printer uses BR-Script3.
According to Brother's website, "BR-Script3 is PostScript®3™ compatible".

http://www.brother-usa.com/Printer/ModelDetail/1/HL6180DW/spec#.U2hDKLylhuY

Has anyone printed successfully to a BR-Script printer using CUPS and the
generic postscript driver?

Thanks,

Andrew