I've always been taught that those 4 and 5 day bodypart splits are only for guys on gear. Should I now switch to one of these routines while on cycle? I had planned on doing an Upper Lower split, and hitting everything twice a week. Does it make much difference? Its been preached for so long that I should do legs twice a week that it I'm hesitant to switch up.

Here is the routine, Lyle McDonald's generic bulk routine. I'll probably keep the reps to a minimum of 8.
Mon: Lower
Squat: 3-4X6-8/3' (3-4 sets of 6-8 with a 3' rest)
SLDL or leg curl: 3-4X6-8/3'
Leg press: 2-3X10-12/2'
Another leg curl: 2-3X10-12/2'
Calf raise: 3-4X6-8/3'
Seated calf: 2-3X10-12/2'
Abs/low back: a couple of heavy sets apiece

Tue: Upper
Flat bench: 3-4X6-8/3'
Row: 3-4X6-8/3'
Incline bench or shoulder press: 2-3X10-12/2'
Pulldown/chin: 2-3X10-12/2'
Triceps: 1-2X12-15/1.5'
Biceps: 1-2X12-15/1.5'

What do you think? this routine or should I find a nice "bro-split" and pound a body part once a week?