Ultherapy results are typically seen over 3-6 months following treatment. It is common to see some early changes in the first several weeks due to the thermal effect of the treatment. Early treatment recommendations with Ultherapy did not include a second treatment. However, ongoing studies with Ultherapy have shown dramatic changes can occur with a second treatment six months after the initial session. The reason the results are improved, is that the new collagen formed from the initial treatment is very responsive to the ultrasound stimulation and may provide a better result.
I would not be discouraged at three months or even six months, as the results do improve with time. I agree that looking at your pre-treatment photos is very helpful as some results are subtle, but still very worthwhile. I have treated over 40 patients with Ultherapy since February of 2010, and with proper patient selection and education, my patients have been pleased with their results. Ultherapy is not the same as a facelift, but for many patients it is an excellent option for skin lifting and tightening and requires no downtime. In the future, I expect more patients will be interested in additional treatments with Ultherapy since the results can offer further improvement than with a single treatment alone.