I think you just made that up!
It's true nevertheless. It all depends on how you test and what you test. Most claims of this sort, unless they come with a specific test procedure, are worthless. Even if you compare a CFL to a box of incandescents that are used one by one, you need to specify how often they are turned on and off.
This is exactly why many bulbs in my house are still incandescents, and I can't replace them with CFLs - by the time they'd warm up I'm already out of the area; and while I'm walking through the place their light would be too dim.
LED lights don't have this problem, but they are insanely expensive and usually very directional. Many are not dimmable. I'm buying one (different) LED bulb every couple of months to see how they behave, and so far I'm not that impressed. A 60W floodlight, for example, is very bright indeed, but the light spot on the floor is about 1 foot - what I'm going to do with that? Yesterday I bought a couple more different types, still expensive, but I'm looking for one that works well.