Actually I think they'll do reasonably well at worlds. Their conditioning improved quite a bit at 4cc, and it's very possible they'll peak in Tokyo.
They'll come in top six, that's pretty certain. If Miracle strikes and some top Chinese pairs and/or German pair bomb, they do have an outside shot at medals. In short program, they do 2A instead of 3toe, they'll score around 62 points if she lands that 3A. Remember at GPF, they beat S&S(she popped a 3toe, i believe) in short program even with a fall.
I&B are getting decent PCS these days, I believe their PCS scores are in high 6s these days, which means only the three Chinese pairs, one German and one Russian pair have higher PCS scores than them.
But their programs are just dreadful these days. Watch their 2004 4cc LP, I can't believe they were far better skaters at that time even without that throw 3A.
http://www.youtube.com/watch?v=RI--txj-FFY&mode=related&search=
They had far more interesting choreography, lots of transitions, in-betweens, lots of innovative and difficult lifts. They also had very good speed and power.
I don't know who did the programs for them the past two season. Their lifts, pair spins, death spirals are just awful. There's very little choreography in their programs.
The interesting question is whether they'll retire after this season. They were contemplating a retirement after Olys but decided to try another season. I think they will not retire. I mean, in terms of medals, prize money, they have had perhaps their best season in their entire career. One gold medal, two silver medals at GP events, fourth place in GPF.
After this season, Shen & Zhao, Pet & T are definitely leaving. So it may be very tempting for I&B to stay even longer.