There is a huge movement of diaspora groups back into Rwanda. There are a lot of people who have been returning.
If you're wondering about Congolese refugees, there were a lot who came two years ago, and there were a lot who were speaking Kinyarwanda, so I suspect that many of them were actually of Rwandese descent.
As far as those who have come back to stay goes, there is a huge movement back into the country.