As a mortgage lender, the easy answer would be to say "Buy your home now, before you lose out on these record low rates!" But of course there have also been many times in the last 13 years that people have heard that rates can't go any lower, and yet other than the last 6-8 months, they have been in a pretty regular decline.
The biggest difference in the last few years is that low rates have combined with moderating/falling home prices to improve affordability for most buyers.
My advice is not to play into the fear of missing the bottom of the market, because you may look like a fool when those predictions turn out to be incorrect. But I would certainly encourage buyers to move quickly on opportunities that are within their affordability range, especially now that home prices have started to rise again. For 95% of typical home buyers, timing their purchase based on interest rate or home price cycles is senseless (if not impossible except for the luckiest among us). The more important objective is to find a suitable home with a payment that fits overall financial picture so they're not second guessing themselves 6, 12 or 36 months down the road. Happy customers make the best referral sources!