moving from java 5 to java 6 or 7

Hi all,

We have a client that wants to move from java 5, and doesn't know if he should upgrade to java 6 or java 7.

Zvika posted a while ago a link to an interesting article that suggests skipping on java 6 and moving straight to java 7:

What do you think? Would you skip java 6 and move straight to java 7?

Note that the reason the client wants to upgrade is mainly performance (after they fine-tuned the GC and upgraded to the latest jboss).