Planting Bulbs Deeper Than Recommended

I planted many bulbs this fall. I read somewhere it was good to plant them deep. So I planted them deeper than the package suggested. Will this hurt?

Planting bulbs too deep can result in bulb rot and a bit of a delay in spring growth. In general, plant bulbs a depth 2-3 times their vertical diameter. In heavy clay soils keep bulbs within the top six inches of the soil. This helps avoid rot caused by poor soil drainage. You can plant bulbs deeper in sandy soils. These better drained soils allow you to plant larger bulbs up to eight inches deep.