normally good advice, but it is a conservative stance and one should understand what they are choosing if they go down this path imho.
Fresh out of college is a time when you can take the highest risk in terms of jobs; your expenses ought to be quite low (zero dependants presumably), you can share house/get room mates etc; you can work long hours without hugely impacting health short term (as you get older, you will no longer be able to function this way).
Therefore, if you would want startup experience, and a chance at making it big (both financially and experientially), there's no really better time than straight out of college. Of course, nothing prevents you from doing so later in life - there's a large variation in startup career, and what i described is merely just one anecdote.