I have heard this position repeated multiple times and it's not consistent with the independent Canadian research on the topic (Prof. Webster among others). Among other things, I also think it would deeply strange for criminal defendants to receive fewer procedural options than civil defendants, who are entitled to do discoveries in addition to comprehensive disclosure to prevent trial by ambush. Since the 80s, the overwhelming source of delay has been post-prelim, finding space in Sup Cts. I am not sure how people thing pressing more cases into Sup Cts, sooner, is going to reduce the delay in those courts, especially where the cases remain at full length because nothing has been trimmed or confirmed or agreed upon following a prelim.