I have had probably 15-20 Squier Standard Jazz's ... up until about 2007-8 they have NO channel routing (to control cavity), but do have an enlarged neck pup route ... I always looked for them between 2000 and 2006 generally, and was always safe with the no channel route, and they also came with the better machines, virtually the same as used on MIM Standards, and the Highway Series basses (the ones with the rounded bottomes, not flat) ... I ALWAYS used my SqStands without the pickguard ... easy way to take 1/4 lb off the bass, and generally the p/g's were less than ideal quality ... I still have 2 of the SqStands that I had purchased .. one that somebody had sanded all the paint off and did a terrible stain job on .. I have further carved it up as a test bed, but I have no plans on selling that anyway, and it was my very first Squier Standard, that I was so impressed with for such an inexpensive bass, that it led me on a long road to purchasing MANY ... and the other is actually a sub 8lb bass, with an alder body, the same thickness as an American Vintage (and the current Road Worns) ... there were some very good basses that came along in that now discontinued Standard line .. and they were totally dismissed for the most part by the BP public at large ... for all intents and purposes, the Squier Standard line morphed into the now Vintage Modified line in may ways ...
Edit to add: .. I forgot to mention, that the newer ones I purchased (can't remember for sure, but after that '07-'08 time frame ?) DID have channel routing from the neck pup to the control cavity ... usually if the neck had the flat bottom machines, the body was channel routed ... but again, I can't confirm it in all cases as I stopped buying them post 2006 birth date ..