I had my interview at the Dallas DO today May 14th. It went very well. I was very nervous about my extensive travel over the past 5 years. I had some 800 odd days of travel that included trips to a lot of countries in the world. But none of my trips was over 6 months, the maximum trip length was 110 days. I was working for a US company as a contractor and did have a letter from the company for the reason for the numerous visits.
I have read somewhere from another person's experience that if you want a faster Judicial Oath Ceremony, you should take matters into your own hands. What this person did was to call up most of the Judges (District Court?), who can perform such matter, & to ask/request if s/he could perform the service for her. That was how she got hers done quicker than waiting for the normal time frame it takes this type of ceremony to be scheduled. Depending on your DO, it could be a very long time (5-13 months).
The service provided by Art Shiflet and Mathew Chacko from Mr.Khanna's office during my citizenship process was exceptional. They both provided me prompt answers to my inquiries, updated me with information as soon as they became available and were extremely knowledgeable . I would highly recommend Mr.Khanna's office for any sort of immigration cases