Share 'experience w/small block tread patterns?'

Late last year, I scored some wheels with Tufo Flexus Cubus tires glued and ready to roll.  Finally got to put them through the paces yesterday on some hard pack, loose dirt, wet grass - just about everything except serious mud.   Anybody have some insight as to what I might expect in terms of how tires with small block tread patterns tend to shed mud?  Having never ridden small block tire before…