It is a response to the problem of magistrates' court trials being repeatedly adjourned or being too concerned with debating irrelevant evidence - often for minor offences.
Defence lawyer Stephen Nunn believes the new system is hitting the prosecution as hard as it is hitting the defence:
He said: "I can't imagine in reality they like it one little bit because they lose cases because of silly time scales, and inflexibility, and criminal procedure rules.
"So undoubtedly there will be some defendants who ought not to walk free, but do, as well as defendants who should walk free, and don't."
The 5 live Investigates programme contacted defence lawyers across England who all said they had examples where their clients were expected to enter a plea without knowing the exact evidence against them.
In some instances, the evidence eventually cleared defendants of the charges facing them.
Justice delayed is effectively justice denied, and we've got to remember there's a victim in all of this?
Richard MonkhouseThe Magistrates' Association
Lawyers say the CPS is choosing to drop charges, or pursue more minor charges, because it speeds up the time it takes to prepare a prosecution file.
The Crown Prosecution Service did not comment on the claims.
The main aim of the Stop Delaying Justice initiative is to ensure trials are completed within six weeks. Defendants get just two hearings, one to hear the evidence and to make a plea, the other to hear the trial.
Deputy chairman of the Magistrates' Association Richard Monkhouse said that while a six-week, two-hearing limit is the ultimate aim, courts should still be adjourning to allow the accused to see the evidence if there was genuine need.
Mr Monkhouse told the BBC he hoped adjournments would be rare:
"Justice delayed is effectively justice denied, and we've got to remember there's a victim in all of this.
"The victim wants to see that the courts are running efficiently and effectively and that's what we're trying to do."