Slow HD read/write speeds normal?

After installing Tiger I ran xBench to get a (I know I know, none accurate...) feel for what it did for my system.
I was also hoping to see some speed improvments, because my system has been draggin in the last couple months pretty bad. I was hoping getting Tiger on here would give the system a fresh start.

Aside from quite a few things testing lower, here is the HD test information

Disk Test 35.15
Sequential 38.41
Uncached Write 32.87 13.70 MB/sec [4K blocks]
Uncached Write 31.13 12.75 MB/sec [256K blocks]
Uncached Read 82.43 13.05 MB/sec [4K blocks]
Uncached Read 33.92 13.71 MB/sec [256K blocks]
Random 32.40
Uncached Write 25.39 0.38 MB/sec [4K blocks]
Uncached Write 41.29 9.31 MB/sec [256K blocks]
Uncached Read 32.65 0.22 MB/sec [4K blocks]
Uncached Read 34.25 7.05 MB/sec [256K blocks]

Is that uncached read/write speed normal?! Could my drive me having problems and this be the cause of the incredible slow downs and beach balls? In the past I checked my RAM to make sure it hadn't failed, but I never thought to look in to the HD. Can someone tell me if this is normal for a 1.5 year old 4200rpm 80gig drive?

Thanks guys,
~Earendil

So no one around here has any idea as to what is normal? Anyone want to run xBench on their own system to see what they get?

Bloody Intel threads buried my question

~Earendil