Deadline: Wall Street was spooked Wednesday after Disney lowered its earnings forecast for cable last night, citing subscriber slippage at ESPN. Fears that cord-cutting might accelerate are weighing on all Big Media stocks — including Time Warner, which was down more than 8% at mid-day, even after reporting better than expected Q2 earnings. But Time Warner execs urged investors not to worry. “We’ve seen some modest [subscriber] declines in the U.S.,” Turner Broadcasting CEO John Martin acknowledged in a conference call with analysts. Still, “we have not seen any acceleration in the declines.”