no, for two similar reasons:
The short amount of time the verizon iphone and the white iphone have been on the market.
In order to make these things profitable, the length of time from product debut and the next version needs to be longer than the normal june refresh time frame.
Pushing it to September (like all the rumors have suggested) gives a couple more months of purchases before the new iphone comes out.
The bigger question to me, is whether the ip6 (or whatever) will come out in June or in September of 2012.