The split electoral college - with David Miliband winning more votes among party members as well as MPs - places an even greater emphasis on party unity.
It is also the case that Ed Miliband will have been first or second choice of about 66% of party members - as he was the second choice of 40% of those who voted for his brother, though those votes obviously did not count for him.
I discussed this scenario in detail and this Left Foot Forward commentary at the start of September:
Ed Miliband would face hostile media attention if he were to trail his brother among MPs (45-55) and party members (49-51) yet still get elected Labour leader as the strong choice of trade union levy payers and other affiliates – say 58-42.
That would be enough to give him the electoral college 50.6 to 49.4 – along with a headache with the newspapers and the Tory party, who would challenge the legitimacy of a Labour leader elected primarily on union votes. While not impossible, such scenarios are rather unlikely. Any split decision winner is likely to have 45%+ in every section, demonstrating a breadth of support.