I think that ASIC´s wont be able to mine LTC, they should be too specialized on "hardware level". But the FPGA´s may be more customizable
Correct, the speed of the ASIC comes at the price of being able to do only one thing, which it does very well. But being hardware, it cannot be adapted to other algorithms. That said, there's nothing stopping people from designing and releasing an LTC ASIC in the future.