For 28 years, the Annual Report Card has surveyed solution providers for their opinions on their IT vendor partners. Their responses offer a snapshot of how well these vendors are working with partners -- or not -- as well as how their products stack up against their competitors.

Here are the biggest decreases and increases in 2013 -- five vendors whose scores fell year over year and six (including a tie) whose scores showed a lot of improvement.

Note: Given the ever-dynamic IT industry, the product categories covered by the ARC change year to year with some categories being dropped and new ones added (such as Converged Infrastructure this year). So year-to-year comparisons aren't always possible.