A lot of the us Legacy guys on the East Coast (right coast) hare using TDC and he has a lot of happy customers. Jon at TDC has also just hired an internet/sales person to help with turnaround time. Check out legacygt.com where TDC posts a lot for more feedback.
With that said I went with PDX because I was slightly more comfortable with their tuning skills. However, it took six weeks for the maps to show and I am about to send them my logs. I am very concerned it's gonna be months before I hear back on my logs. Jarrad himself though has recently jumped in to help with the turnaround time so I hope things are better now. Oh yeah, car is Stage 1 and pulls great, unfortunately after 1 month I've already gotten used to the power and need more