Lots of folks still +/- 2 levels of ya so no worries there.
Just a heads up the lvl cap on NTC (the first instance) is lvl 28
I made the mistake of thinking it was 29 and missed out on the handfull of group quest in there.
Debating on leveling up my Sorc for a while until folks get up a bit more so we can do the instances and group quest as a guild.