SiSoft Sandra Memory Bandwidth

The P5LD2 has an obvious disadvantage here. I wouldn't be surprised to learn that Intel is keeping memory timings a tad tighter on their higher-end 955 chipset as opposed to the 945, which today's motherboard is making use of. The highest and lowest scores differ by only 250 MB/s, but the placements are definite.
HDTach

There is nothing particularly interesting about the P5LD2's IDE performance scores. It seems to be about 2 MB/s behind most other competitors in burst read performance, though both the other two scores are what I expected.

SATA performance almost mirrors IDE performance identically. Again, the P5LD2 suffers a minimal ~1.5MB/s loss in burst read performance, while the other two numbers are within my expectations.

Intel chipsets have always had spectacular USB performance, and today's motherboard is no exception. Average read speeds are spot-on with the competition at an insignificant 1% CPU utilization.