Is Lean a hype? Yes and No.
If you implement Lean only because you want to jump onto the bandwagon then yes its a hype.
If you implement Lean because it makes sense for your business and will increase profit then no its not a hype, its a great set of tools
I'm getting into this discussion a bit late but you are 100% correct about Lean (and also ISO 9001). If the organization gets into it because it wants to get on the bandwagon (or get the ISO 9001 certificate to make customers happy) results will be limited at best. If it seeks to generate bottom line results, and make Lean and/or ISO 9001 the servant rather than the master (that is, a means of getting results rather than something we "have to do" to get a certificate), the results will follow.
To put this in perspective, Lean is what drove the Ford Motor Company's phenomenal growth during the first part of the 20th century. Its production chief Charles Sorensen credited the moving assembly line, developed circa 1908, with winning the Second World War for the Allies, but there was a 1918 cartoon that depicted Henry Ford as the Kaiser's most dangerous enemy--again due to mass production. Ford made simple with three performance indicators: waste of time (which we can break out into time of things, i.e. cycle time, and time of people, i.e. waste motion), waste of material, and waste of energy. All seven TPS wastes can be expressed in these terms. Taiichi Ohno later credited Ford for the development of the Toyota production system.
Ford also described very explicitly Just In Time (although he didn't call it that) and did what Goldratt's
The Goal later showed to be impossible (the matchsticks and dice experiment); he ran a balanced factory at close to 100% capacity. From
My Life and Work (1922), "The idea is that a man must not be hurried in his work—he must have every second necessary but not a single unnecessary second." That is, no operation has excess capacity. This works only if there is essentially no variation in the time taken to process each unit and to move it to the next operation. Ford deliberately removed the variation.
Here were the results as recognized in 1915:
"Ford's success has startled the country, almost the world, financially, industrially, mechanically. It exhibits in higher degree than most persons would have thought possible the seemingly contradictory requirements of true efficiency, which are: constant increase of quality, great increase of pay to the workers, repeated reduction in cost to the consumer. And with these appears, as at once cause and effect,
an absolutely incredible enlargement of output reaching something like one hundred fold in less than ten years, and an enormous profit to the manufacturer..." (Arnold and Faurote, 1915,
Ford Methods and the Ford Shops, introduction by Charles Buxton Going).