http://startingstrength.com/resource...ighlight=obese
If you support your training, your training will support you. I don't see what switching to an intermediate program would do since eating on a calorie deficit usually doesn't allow for gains, or if it does, there are slow and hard to come by. Have you tried eating to maintenance and controlling your carbohydrate intake?
To answer your squat question, heavy squat start to feel like good morning after a while, at least they do for me. I'm sure Gary Gibson would agree since he came up with his "push your traps into the bar" cue to raise the chest to prevent any type of good morning. Also, how long you take to get out of the hole is how long is takes, although the slowing down of the bar may suggest smaller jumps or a light squat day on Wednesday.
Also, are you using a belt?