Yes, Tutsis have been the ruling class in Rwanda for centuries, and still are. Hutus dominated Rwandan politics for around 30 years after the Belgians left, but lost everything during the civil war.Weren't the Tutsis viewed as being higher status?
The interesting thing genetically is that Tutsis seem to be mostly "Hutu" on their paternal side, having more Bantu y dna than Cushytic.