Great advice NuberTwo. As always.
I was doing internship at MBSC in Woburn, MA this summer and speed work was more in line with RSA. To be honest, Boyle program is better than 90% of programs here in Serbia, but even with that I must notice that some of his solutions are chosen to be in line with the context and goals of MBSC and that is money making. During summer 400+ athletes passed through the gym in groups starting every 15mins. So to provide service to all those athletes certain compromises needed to me made. That includes speed work (short rest, very small volume, 4-6 sprints of 15m) and conditioning (is it money wiser to spend 30mins developing aerobic capacity or do 10min intervals?).
I remember being look weird when I did 20min hill sprints with the soccer players and giving them 2min rest between sprints.
The problem was that one discussed by Charlie of High-Low. Keep the high high and low low. Lower level athletes tend to meet at the medium: they slack at speed work not giving their best, and they race at tempo, thus everything gets the effect of medium intensity work, which is B.S.