Dr Jennifer Longhurst, head of Surbiton high school, Kingston upon Thames, for one, contacted the Diary to enthuse about the minister, once described by another head as 'a Year 8 in a suit'.
Dr Longhurst, in stern schoolmistress mode, had ambushed Miliband (the product of a state comprehensive education) with a question in a series of foreign languages. "I asked in French: 'Could you answer this question for me in French?' and then I repeated it in Spanish, Portuguese and Italian," she explained.
"He answered, in practically faultless French: 'I have understood your question, but actually there wasn't a question was there?'
"His use of the indefinite article was incorrect, but it was such a small problem and the accent was so good - better than A-level standard!" said the enraptured head.
More surprising for those familiar with Milibabble's sometimes tortured relationship with the English language, she reported a complete absence of jargon. As Dr Longhurst said: "Bravo, monsieur le Ministre!"