Of course, this means that you have done your job by investing their assets responsibly and not speculated with the funds. Also, it's understood that the percentage of growth and income were based on defined time frames; obviously, the shorter the time frame, the less the percentage in growth.
In the 26 years in this business, my experience has been that clients do in fact understand what's going on and just need some hand-holding and reassurance. Media reports are enough to scare anybody. To use a clich?, clients don't care how much you know, until they know how much you care. It's up to you to make sure that they know you're looking out for them. It's during times like these that you earn your fee.