Whoopsies.  We were talking in my Pretrial Practice class a week or so ago about various ways that lawyers can make a fatal mistake and thereby waive an objection to personal jurisdiction.  And, contemporaneously, along comes this case.
Two lessons.  First, don't request discovery in order to oppose a request for a preliminary injunction.  At least if you want to preserve your objection to personal jurisdiction in California state court.  Justice Spencer holds that the discovery request constitutes a general appearance, and thereby precludes a motion to quash.  This is a hard lesson learned by counsel for the defendant here, who are represented by Scott Sirlin (of Gordon & Rees) and Anthony Paduano.  Ouch.
Second, don't trust everything you read in Weil & Brown.  Because, as Justice Spencer notes (in footnote 2), that fine Rutter Group publication flatly states that requests for jurisdictional discovery don't waive personal jurisdiction.   But it's wrong; moreover, the case that it cites (Roy) doesn't say that.  Double ouch.