If you don’t change how people think, the quick improvement can end up not helping much. I think quick wins help. But managing how those quick wins happen is important. Creating a maintaining a dialogue that while quick wins are possible, much bigger wins are possible by building on the gains to adopt more critical improvement (and often more complex and requiring more effort) .
As quick wins are achieved try and be sure they are building capacity at the same time. Get people to think in new ways and see improvement opportunities. Also have people learn new tools to attack more problems with. I firmly believe you learn lean best by doing lean. So getting quick successes is great training – better than classroom training. But in doing so, you do want to focus on making sure people understand how the quick fix is a process they can repeat to improve other areas.
And one of the skills you have to practice in the example mentioned in the post mentioned above is managing up. It is tricky but part of what you need to do is coach your bosses to understand lean so that you can expand the adoption of more lean thinking in your organization.