He didn't say that it felt slow or was slow... he said that it would feel slow in certain circumstances, and in those circumstances, it would be slow.
An example may be warranted...
In 4.84, let's say the Saber is faster than the Titan.
Now, hypothetically speaking, let's say the Saber is nerfed of speed, whilst the Titan is unaltered. This will have a double effect. The Saber will seem slower against the Titan... and the Titan will seem faster.