Unacceptably high, myself.
Call me a skepchick, but I’d pretty confidently expect his figures (if he’s been running for long enough) also to show at least a 35% drawdown, on that basis, and I’m very well aware that almost everyone who has a 35% drawdown “in there somewhere” will at some point also experience a 70% drawdown, and that almost everyone who has a 70% drawdown “in there somewhere” will at some point also blow the account completely and join the ever-increasing throng of “here today, gone tomorrow Martingale traders” whose income sources (if any) come mostly from selling signals and/or handling others’ funds rather than from their own trading.