Care to make a wager, iCEBREAKER? 1 BTC that the longest proof-of-work chain contains a block larger than 1 MB by this time next year (10-Jul-2016).
If you lose, I want real Bitcoin. If you win, expect to be paid in doublespent Gavincoins. 
Did you just agree to the bet? I can't tell.
We'd both deposit 1 BTC to a multisig address (3rd key held by neutral party). If the chain forks, the winner would automatically have coins spendable on both sides.
You can't tell because you edited out the part of my post which answered your question:
1MB blocks may become a harmful constraint by this time next year, given some black swan for fiat or rapid deployment of sidechain/Lightning. But we're are not even on course to begin getting there yet, given the unwelcome distraction of the Gavinista insurgency inciting the get-rich-quick XT mob. TX fees are still orders of magnitude below their cost in electricity, etc., demonstrating fee pressure insufficient for develop mature markets.
There's also the possibility we do get a technically and politically feasible velvet divorce, in which case we can forget all this nasty controversy about the "best" block size and start a new nasty controversy about which is the "real" Bitcoin.
I suspect we agree that should 1MB blocks become an undeniably urgent concern (EG, if we see actual congestion resulting in appropriate fees no longer prioritizing their tx) the controversy will rapidly dissipate and be replaced by emergent rough consensus.
There's also the possibility we do get a technically and politically feasible velvet divorce, in which case we can forget all this nasty controversy about the "best" block size and start a new nasty controversy about which is the "real" Bitcoin.
Does ^that^ help, or do you require pictorial aids like dear old befuddled Doctor Frappuccino?
