I wouldn't say we will see an obivous spike in hashrate as I think they are still replacing previous generation hardware. See for instance the S2, and UMISOO(S2) going offline because it is no longer profitable on Hashnest.
I'm just taking an educated guess, but I still think we see the S7 released in September. Also to guess the price check out this thread:
https://bitcointalk.org/index.php?topic=1159185.0The Statement from resellers seems to cooperate with your opinion
S7 release in September 
Let hope prices are competitive
Do they ever mention what the hashrate will be? Or, just the power consumption per Th/s as 230 watts?
I may be stretching, but a 2.4+ Th/s machine for <$700 SHIPPED would be amazing.
very first page says how much per TH

.. of his thread.
That release date reminds me of a MS release or game release . lol
At the wall power consumption AntMiner S7 230W/TH
were all guessing on the a mount of speed it ships with . why not 340 to 400, S3 and S5 were amazing to and priced right .
If anyone noticed they left out the S2 and S4 and S5 + on the front page which make is even more positive for everyone . but I'm hopping