You've read both of these things incorrectly. First off, 40% all in is too high for california (but not by a huge amount, it's like 38% but that matters). Secondly, they allowed for living expenses, the 135 was what was left after (from the 180 take home). Can argue about the amount, but they allowed for it.

Realistically you're going to do 401(k) and match so you're probably taking home a bit over 200k. Allow 50k/yr living expenses and you'll have another 150/yr or so. Quite plausible to bank 1 million in 5 or 6 years with these numbers.