Trading pairs at ICO launch will be SHDW/BTC, SHDW/ETH and SHDW/Waves
Announcing the exact size of sell walls and price tiers is not possible. Assume it's as if somebody went to their stock broker and said "sell all these shares at the best price you can, gradually between 1-4 weeks". The stock broker will sell in small batches, changing the price with demand.
Ok, if I understund :
The ICO will be a "sell @ market price", but in this market, there is only one seller, the dev and multiple buyers.
Dev. will sell at the higher possible price, but he want to sell all the tokens, then price will be a compromise between the demand and the token amount :-)
Interesting concept : no doubt about the ICO succes, just a little bemol about the date for the BTC transactions.