While minor delays are really not a cause for concern, there are a few things you need to watch for. (ourfamilyworld.com)
While this issue with the test servers only caused minor delays in most districts, it also presented a different problem: Some students were able to log - in to the test and read the questions while others were not able. (edimprovement.org)
Sometimes it took a few seconds before I regained control of the UI, though I've seen similar, minor delays with many e-ink-based readers. (pcmag.com)