I feel Cialis takes effect more slowly but has a long lasting effect.  Cialis builds up in your system & has effect for more than 24 hours.  C daily is only 5mg.  But to your specific question, yes 10 mg should have full effect in an hour.            

Viagra starts taking effect very quickly...  I feel it's noticeable at 15 minutes.  The V doseage does not matter to effective time...  it comes in 25, 50, 100 mg doses.  They taste bad but that's the only reason for the coating & my MD Rx'd the 100mg dose & instructed me to buy a pill cutter.  I was cutting 100 mg to ~12.5 or 25mg, "more bang for the buck".  

My experience is that more doesn't make it better...  take the smallest dose necessary to be effective.

Tried 20mg and then 10mg cialis (never levitra or viagra) and it worked well, including taking effect in an hour or so, but the side effects were always there, sometimes worse than others.
Then I started cutting the 10mg in half and only taking 5gm and, voila, no side effects. So I got my prescription changed to the 5mg daily version and still only take it when I need to. An additional benefit; it ends up being about $7-8 a dose instead of $20-30.
Just wish the patent expiration would happen and generic was available

with the larger doses of any of them.

I had a pretty intense headache and general flu-like symptoms.  I read in another thread that 20 MG of C = 100 MG of V.  I'm already cutting 100 MG V's in half and will try the same thing with C.  I might even try quartering each pill and see what happens.  Like all of you, I'm interested in performing like a 20-year old without the side effects.