No. The accumulation of lint in the dryer screen generally doesn't have anything to do the amount that ends up INSIDE your dryer. Too little lint is not a bad sign. It's dependent upon the type of clothing you are drying as well. If the clothes are not "lint givers" (like cottons and wools), you generally won't see a lot of lint in the dryer screen. Dryer screens are not perfect, either and some lint always gets through. As long as there are no holes in the screen and you have it seated correctly, and you clean it after each use, you shouldn't have any problems.
What affects dryer performance the most, is your vent hose and routine cleaning. The simple rule of thumb is: The SHORTER and STRAIGHTER the vent hose the BETTER. The vent hose should also be cleaned thoroughly periodically. I recommend once per season. That's about 4 times per year. What causes the lint to back up into a dryer is when the vent hose becomes kinked or clogged. The lint is mixed with moist air when it leaves the dryer. If it has no where to go, it starts to accumulate and stick in areas of the vent hose that are sagging, or at tight bends. Eventually, the vent becomes so restricted that the lint ends up inside your dryer. This causes the heating circuits to overheat to eventual failure. Not to mention, accumulations of lint inside a dryer can cause a fire. I have personally inspected dryers that were so full of lint that the dryer hose contained about a gallon of water from condensation and the inside showed evidence of multiple fires. If you need further info, I have an article I wrote up explaining all of this under "Tips and Tricks" under my profile. I hope this helps you.