Average 1month Sibor rate in 2011 was 0.28% whereas for 3month Sibor the average was 0.41%. In 2010, average 1month Sibor was 0.38% whereas for 3month Sibor it was 0.56%. Currently, 1month Sibor is 0.32% whereas 3month Sibor is 0.39%. So yes, typically 1month Sibor is lower than 3month Sibor and it would be advantageous to get a floating rate package based on 1month Sibor rather than 3month Sibor.