There are 2 rhumba sequences, one on the judge's side of the rink and one on the other side. The side of the rink determines whether it is the R1 or the R2 rhumba sequence. The dancers can choose to do R2Sq before R1Sq. The sequences do not have to be consecutive either. (R=rhumba, Sq=sequence)
Here's Meryl & Charlie's rhumba sequences. They do them as the 2nd and 3rd elements in their program:
2 R2Sq4+kpYYY 7.00 1.00 2 2 2 2 2 2 2 2 2 8.00
3 R1Sq4+kpYYY 7.00 1.00 2 2 2 3 2 1 2 2 2 8.00
rhumba sequences have 3 key points (kp=key point)
Each key point is marked Y or N by the tech panel. Y=yes, N=no. If the team gets all Yeses, they get level 4 for the step. Level 4 has a base value of 7.
The first key point is that little dipsy doodle quick change of edge at the start of the sequence (both the man and the lady must get it right to get the Yes:
The second key point is the series of steps involving that wide stepping chocktaw, and it's for the lady's steps.
The third key point is the series of steps involving that wide stepping chocktaw, and it's for the man's steps.
The GOE's are assigned by the judge's (who also know what the steps of the rhumba are supposed to look like. So since Meryl and Charlie got level 4's it's not surprising the judges gave them nearly straight 2's for GOE. Consequently, they have 16 points for the rhumba.
Now let's look at Tessa & Scott's rhumba:
1 R2Sq3+kpYNY 1.00 6.00 0.93 2 1 3 2 2 2 2 1 2 6.93
3 R1Sq4+kpYYY 1.00 7.00 0.79 2 0 2 1 2 1 1 2 2 7.79
Tessa did not get the tricky edge in the first rhumba sequence (the second key point), so they only got level 3.
Plus they were not as strong as they might have been in the 2nd sequence, at least in 5 of the judge's eyes. Even the judge that gave them a 3 in the first sequence dropped to 2 in the second, and felt it was not as strong.
The result is that they only 14.72 for the rhumba.
And so forth.
jcoates' point about no prescribed type of Latin in skating is correct.
And I generally find it pretty funny that a bunch of Europeans & North Americans & Asians are getting irate about what "Latin" is. Even Latin ballroom differs between Europe and the US. Neither is much like the Cuban "Son" that is the beginning of the rhumba.
The ISU does not specify what Latin is, but the ISU rhumba is no way a Latin rhumba, because it doesn't have the usual rhumba beat. It was invented by Walter Gregory from the UK.
As jcoates points out, all 6 teams here have taken a very different approach to Latin. All are valid, and you are free to like whichever you like, but it shouldn't affect either the IN or CH PCS mark, IMO, other than that judges are people, and will have their idea of what is the best interpretation.
The rhumba pattern dance does have some more info:
The Rhumba, under the name "Son," originated in the slave quarters of Cuban colonial plantations. The "Son" is quite different from the Rhumba ballroom dance known in the United States and other countries. In the "Son," the couples dance separately, representing a primitive version of the battle of the sexes. Among ballroom dances the Rhumba is quite unique. The music has a seductive, primitive charm, and yet, when correctly danced, the Rhumba is as smooth and decorous as most other ballroom dances. The one distinctly different characteristic is the Rhumba motion which is essential for correct expression and interpretation.
Special attention should be given to the timing for this dance, especially to ensure that a full four-beat edge is skated on Step 13. A firm but not stiff Kilian position is necessary throughout this dance. Erect carriage, proper expression with smooth knee and body movements (not jerked) are required to properly portray the character of the Rhumba. It is important that the cross choctaws are skated as wide as possible (but not jumped) with the free foot crossed.