Everybody wants to pass their test as quickly as possible and there are driving schools who offer crash courses in a very short space of time. What they fail to disclose is that the pass rate for intensive courses is much lower than if you learn at a regular pace where you are likely to remember most of what you are being taught. Cramming too much in also increases the pressure of taking the practical test.
I believe 2 hours tuition per week plus private practice is sufficient for progressive learning but I can offer more hours per week if required. I would advise a limit of 5 hours per week as I feel this is where the average beginner will reach their learning saturation level.
Most responsible Driving Instructors and the DSA strive for pupils to learn how to drive safely and racing to pass their test can jeopardise the safety factor as vital driving disciplines can be overlooked after passing the test. Thankfully the days of passing your test and then learning to drive are gone!