How did those companies do on the Joel test?
A lot of companies talk the talk but just don't walk the talk. PERIOD! One asks in an interview and the words are spouted. But that's exactly what they are - just words.
I have a friend (800 math achiev.,780 math SAT, Ivy League degree) with close to this number of jobs(say 7 don't know exact number)in 8 years and for every job he left there was a genuine reason to leave (get this one - a "principal architect" said "we don't use templates here"- I guess motivation left over from REALLY buggy MS compiler days), at another one, no STL, at another no exceptions. (All this in non-RT,non embedded code so no real reason for the rule)
At another (3 years ago) a VC6 shop with 15 inch(!!!!) screens,1.2 GHZ single processor machines with 500 mb memory and 37 GB drives.
He was not allowed to build projects with browse file enabled because "the .bsc and .sbr files take up too much space and they take too long to build" He ended up bringing his laptop in to do his work. He had a spare 21 inch flat screen at home and brought that in too. (Guess what - the other programmers there were a bit envious and HE ended up being considered slightly disruptive!) Of course, how one is supposed to (rapidly) learn a VC6 code base without the source code browser is beyond me.
It is incredible how stupid many companies are. They lose half (all right I exaggerate 33%) productivity of a $150000 fully loaded (space, benefits etc.) programmer for a savings of $3000 (3 year depreciable!) capital cost.
Another question is "how many of the 9 jobs were startups?"
Regarding your question as to pursue, I would be MUCH more concerned about where he went to school and how he stands up under a whiteboard interview than a resume. To me a resume is just supposed to get you in the door - Is he "interesting"?
Not to be ornery, but, how does your company do on the Joel test?
If you don't pass, maybe anybody REALLY good will leave in a year.