Revision b3f2c3ea-fd0b-4102-8c37-0bc19aec2db6 - Code Golf Stack Exchange

#Java, <s>404</s> 388 bytes

<!-- language-all: lang-java -->

 import java.awt.*;import java.awt.event.*;class M extends Frame{{TextField f=new TextField();add(f);f.addKeyListener(new KeyAdapter(){long t,i=96;public void keyPressed(KeyEvent e){t=t>0?t:System.nanoTime();char c=e.getKeyChar();System.out.print(c+(c==++i?i>121?"\n"+(System.nanoTime()-t)/1e6:"":"\nFail"));if(c!=i|i>122)dispose();}});show();}public static void main(String[]a){new M();}}

And here I thought Java Console was already verbose.. 
Since Java has no way to raw listen for key-presses in the Console a.f.a.i.k., I use a GUI with `java.awt`.

-16 bytes thanks to *@OlivierGrégoire*.

**Explanation:**

 import java.awt.*; // Required import for Frame and TextField
 import java.awt.event.*; // Required import for KeyAdapter and KeyEvent
 class M extends Frame{ // Class (extending Frame)
 { // Class-initialization
 TextField f=new TextField() // Instantiate an input-field
 add(f); // Add the input-field to the Frame
 f.addKeyListener(new KeyAdapter(){ 
 // Add a KeyAdapter to the input-field
 long t, // Long to save the time
 i=96; // Previous character, starting at 96 ('a'-1)
 public void keyPressed(KeyEvent e){ 
 // Override the keyPressed-method:
 t=t>0? // If `t` is already set:
 t // Leave it the same
 : // Else:
 System.nanoTime(); // Save the current time in ns (== start the timer)
 char c=e.getKeyChar(); // Get the character pressed by the user
 System.out.print(c // Print this character
 +(c==++i? // +If it's the correct next character in the alphabet:
 i>121? // and we're now at 'z'
 "\n" // Print a new-line
 +(System.nanoTime()-t)/1e6 
 // + the end-time in ms
 :"": // Else (an incorrect character was pressed)
 "\nFail")); // Print a new-line + literal "Fail"
 if(c!=i // As soon as an incorrect character is pressed,
 |i>122) // or we've reached 'z':
 dispose(); // Exit the application
 } // End of keyPressed-method
 }); // End of KeyAdapter
 show(); // Initially show the Frame
 } // End of class-initialization
 public static void main(String[]a){ 
 // Mandatory main-method
 M m=new M(); // Create an instance of itself (of the Frame)
 } // End of main-method
 } // End of class

**Example gif of success:**

[![enter image description here][1]][1] 
**Example gif of fail:**

[![enter image description here][2]][2]

 [1]: https://i.sstatic.net/qYPs4.gif
 [2]: https://i.sstatic.net/pgIAE.gif