i would rather they take whatever time they need to get the new accounting system switched over correctly and do it right for the long term of the company, not rush something out to please a couple investors posting on a message board.
i think any good boss would understand that situations come up, and would appreciate your informing him and letting him know the situation and when he can be expecting you, just like i as an investor appreciate the company informing me and letting me know the situation and when i can be expecting the financial statement.