I am running into similar results with a 2.5" laptop HD in a Lenovo T61. My current test is at 3% and I alreay have 733,000 ECC and 28,000 seek errors. Mine may also be a Fujitsu drive. I'll check once it is done running.
I run spinrite on a lot of lenovo laptops and see this same thing a lot. High ecc and seek errors but still pass manufacturer diagnostics. If I run spinrite immediately after it finishes the errors do not seem to decrease.
The burning question is? Is this a harbinger of failure? (haven't seen it) and does this condition affect performance?