Hi,
There was an old thread where this was discussed. I believe this was added to the feature request list in our systems (although I'm sure the full-time engineering staff can correct me if it isn't). In the meantime, you can get equally effective results by tapping in a time for delay A (with tempo mode off – the tap tempo will just tap in quarter notes calculated in ms), then multiply that number by either the golden ratio or its inverse (actually 1.618 and .618) and you'll have delays that are close enough.
Thanks,
Nikhil
