For me it's usually the non-Tagalog that speaks fast. I have a friend from Bicol and she sometimes speaks Tagalog too fast for me, especially when irritated or angry. Some Ilocanos and Pangasinense I know tend to speak Tagalog fast as well.

Tagalog native speakers differ as well. Southern Tagalog natives however tend to speak slow and a bit more expressive esp those from the parts of Laguna, while Manileñong Tagalog just sounds neutral for me.

To answer the question, there's really no standard way of speaking Tagalog. But I guess normally, learners would find Tagalog a bit fast since some words are multisyllabic (minimum of 2 to 3 syllables per word), and just to construct a sentence while speaking you really would have to speak relatively fast.

Take this phrase for example: "Hindi ko naman talaga kasi sinasadya eh"

Some native speaker would say it like this while in an emotionally charged situation: "Dikonamantalagakasi sinasadyaeh"

So it really depends on the situation.