Re-itterating what over+out said, The TMA would not function properly without standing agreements with level restrictions.
Even since Sept 11th the TMA is still very busy and us controllers do not have time to use long extended RT to clarify whether the previous level restriction is still valid.
Anyone who disagrees obviously is not a VALID TMA controller.
I realise that technically a new clearance replaces an old one, but common sense tends to support the fact that the previous level restriction is still valid.
In my experience the level is far more important than the speed limit point.
Please continue to adhere to the level restriction as it makes everyone's lives easier.