Database IO comparison
The performance numbers that someone else gets from their array compared to the numbers that you get are totally meaningless.  I could have 1000 disks in my array backed with 512 Gigs of cache or I could have 2 7200 RPM disks in a RAID 10.

Without knowning the exact configuration that your array is configured in the numbers are just numbers.

Another thing to note is that 4k IO are a worthless measure as are 512k IO.  SQL Server will be doing almost all of it's IO in 64k IO.