Gilder, I just tested the Squid and there is some change. My test was as follows:
Turn AI off. Create a test dummy so you can pull up next to it without turning. Park next to it and create another one ahead of you in the same position. Go full forward looking directly sideways until the center of the test balloon is even with your pilot, and slam it into full reverse. Start counting. Stop the count when you see the middle of the balloon again. Keep going in reverse until you see the first balloon again, and slam it into full forward while starting to count again. Once again, stop the count when you see the balloon. For note, I use a slow count of "Mississippi 1, Mississippi 2" (easier to keep track of numbers if you say the number after your word). Keep going forward and back without stopping and recount a few more times to confirm results.
Dev App results:
Reverse turnaround: 6.5ish counts.
Forward turnaround: 5 counts.
Game results:
Reverse turnaround: 7.5ish counts.
Forward turnaround: 6 counts.
Conclusion: There is a full second of difference in reversing course on linear lateral movement. Try to set up more controlled tests for rotation and height.