You cannot be more wrong. First of all its not about the age but about the fact that 4460 is a Haswell refresh. In which case the only chipsets that where supporting them from the start was Z97 and H97. For B85 and H81 there was not chipset upgrades.
Now if you think any mobo out on the market will have updated bios then you are naive, how about old revisions, old batches, old shipments laying in the stores everywhere. To be sure you would have to simply ask the seller about the bios revision.
So long story short, you either call the shop and straight ask about it, borrow an older CPU and upgrade yourself or get H97.