I hate to jump into this as well because I find this whole debate silly. However as posted here two years ago I was advised by my attorney in very clear term that asylees should not go back to their countries before citizenship. He told me that he has represented people placed in deportation proceedings for this reason.
My attorney is Michael Maggio.
http://www.maggio-kattar.com/seniorstaff/maggio.asp
He is considered one of the best attorneys in the country. He is also in close touch with the USCIS at the most senior levels. I said this because at the time it took the USCIS forever to approve I-730 petitions. I really needed to bring my dependents here ASAP. Mr. Maggio could pick up the phone while I was in his office and spoke to someone at USCIS central office. My petition was approved the following next week.
So I have faith in the view of my attorney which is by the way consistent with common sense (for a person to go back home after asylee adjustment is like someone who begged everybody for money on account of starvation and then after getting people's charity went to Europe for a luxury tour).