I think Aerad plates are drawn at 170 kts (unless it's a Cat A or B only approach). But, as BEagle says, it's not something to get exercised about; holds are just a way of losing time in a reasonably controlled manner and of making sure you hit the beacon in a position where you can go outbound on the procedure safely. Procedure turns are the same - they're a means to an end - vis. getting into a position where you can pick up the inbound course or localiser easily. Obviously, on test, if you make a complete horlicks of it and hold in the wrong direction or get the timing so wrong on the procedure turn that you never see the centreline again then you'll probably be invited to have another go at a later date but, if you make sensible decisions, even if they don't work out quite right, you'll probably get away with it.