noticed that the servers lagspike when players join/leave and also when new chunks are being generated. moreso on the player leave/join but chunkgen does lag more then it does usualy on other packs. its been suggested that there could be some problem with cacheing and/or data dumping and/or memory leaks. hope this helps the tekkit devs in pinpointing the problem because yeah as is most servers are completely unplayable durring peak hours atm. takes 5 minutes to break a single block IF your lucky enough to even be able to log in.