I hope you don't think sugar gets you 'high' like a drug. That was one of the most pervasive myths of the last century, mostly for psychological reasons.... for instance children getting fed ice cream and cake most often in situations like birthday parties and would be 'hyper' because of the social interaction... the sugar consumption was just coincidental.

Though you can see how easy it is to mistake kids getting a lot of energy from social interactions, with the foods commonly served to children at said social interactions....

"Numerous double-blind studies of the Feingold hypothesis have led to the rejection of the idea that this elimination diet has any benefit beyond the normal placebo effect. Although sugar is widely believed by the public to cause hyperactive behavior, this has not been scientifically substantiated. Twelve double-blind, placebo-controlled studies of sugar challenges failed to provide any evidence that sugar ingestion leads to untoward behavior in children with Attention-Deficit Hyperactivity Disorder or in normal children. Likewise, none of the studies testing candy or chocolate found any negative effect of these foods on behavior. For children with behavioral problems, diet-oriented treatment does not appear to be appropriate. Rather, clinicians treating these children recommend a multidisciplinary approach. The goal of diet treatment is to ensure a balanced diet with adequate energy and nutrients for optimal growth."

http://www.ncbi.nlm.nih.gov/pubmed/8747098?dopt=Abstract

I think in this article what they are talking about being similar to cocaine is actually the taste sensation itself. (Although I might be wrong on that)