Andy_Langton - 2:23 pm on Feb 5, 2013 (gmt 0)

Reading between Google's instructions for the tool it is not an automated process so you have to submit a reconsideration request to get Google to activate

I would say with a high degree of confidence that this isn't the case. The reason Google suggest reconsideration is because this tool is primarily targeting those who receive link warnings (and hence manual action, in many cases). Disavow has an impact whether you are manually penalised or not, although you cannot remove a manual penalty with disavow alone.