Well this thread went a bit off topic.
It is very clear that the consensus is if two players are equal in skill, the allies should receive a bid.
The real issue is determining how much of a bid, and If it is even necessary. IMO the only real way to tell if your opponent needs a bid, is if you have played each other before. While I do think it is common curticy to offer a bid to the allies, you dont actually know if more or less IPCs are needed, more often than not.
What I suggest the community should do is agree on a SET bid for a standard match between two players(or teams) that have never faced each other before. Then sticky the rule so new comers can see it.
All of my games are on tabletop. I play with multiple groups of varying skill level. I would suggest that if your groups skill level varies, keep the best players on separate teams, and try to balance the teams as best as possible, before considering a bid.