Great idea to do a test, do please let us know your results. I know of a couple of other people who've tried this and the cut back seedlings were slower to gain size - and remember that the ability to flower depends on the size of the fan, so slower growth of the crown means later flowering. Sometimes, though, you gotta do what you gotta do.
In theory at least, cutting the leaves back from the tips is a double whammy. Firstly your're reducing the area of leaf that can photosynthesize and produce food for growth. This means that the new growth for a while may need to take its energy food for growth from what is stored in the crown, and/or grow more slowly on what is available from current photosynthesis.
The second whammy is that the most developed cells for photosynthesis in a monocot seedling leaf are the leaf tips because they're the oldest part of the leaf. So any extra light that falls on the remaining parts of the leaves may not be used as well as it would have been on the tips.
Sometimes theories don't pan out because of some unforseen factor, so do go ahead and experiment because the result will be useful information for yourself and the rest of us either way.
