Looking back through ye olde article, some other tidbits pop out that we have to consider which ones were cherry-picked for MGT jump travel.
The conservation of momentum.
The issue of jump space destroying a ship if it makes contact with the ship (somewhat offset by the bubble idea)
Ships can plot an accurate jump within 3,000km for a J-1.
Computers control the jump process (no red-shirted engineers throwing a switch).
One of the benefits of the jump drive is its controllability: jump is predictable. When known levels of energy are expended, and when certain other parameters are known with precision, jump drive is accurate to less than one part per ten billion. (JTAS 24 - pg 34). One could argue that all ships need to do for a tandem jump is to ensure that their systems replicate everything - same energy, same vector, same picosecond of activation. Then the ships could travel and emerge at the same time. Of course, one could go nope, that it's still too complicated/random. However if we believe the the other issues related to tuning and such then this isn't an unreasonable assumption.
Personally I lean towards the idea that if you followed the above, two or more ships should be able to arrive at more or less the same time, if within just a few minutes. You could easily come up with some variables that had ships emerging at slightly different intervals (minutes, not hours or even days).
