I am a speedcuber. I average about 8-9 seconds on 2x2, 35-40 seconds on 3x3 and about 3 minutes on 4x4. I need some tips.
On 3x3, I am pretty fast except for F2L. I use intuitive by the way.
On 4x4, I need a lot of improving. I get about 40 seconds for centers, 1:20 or longer for edges, and about 1 minute for 3x3. Parity is a little longer. For edges I do 4 pair. I do 2, slice, 2 more, then slice back.
On 2x2, I am pretty happy. I do Ortega. I might learn either Guimond or CLL.
Thanks for your help.