In 2003-2004, Amare Stoudemire was a 21 year old, second year player on the pre-Nash, pre-D'Antoni Suns. Here are his Per36 stats from that season compared to Tyrus' since December 1st:
Per 36 Minutes
Amare, age 21 - 20.1 points, 8.8reb, 1.4ast, 1.1stl, 1.6blk, 3.1to, 3.3pf, 15.4fga, 7.7fta, .536 TS%
Tyrus, age 22 - 14.9 points, 8.3 reb, 1.5ast, 1.5stl, 2.5blk, 1.7to, 3.7pf, 11.0fga, 5.3fta, .559 TS%
I admittedly cut some corners since Tyrus is a year older here, with one more year of NBA seasoning, and these numbers are for just his three good months instead of a whole year. But three months is a decent chunk of basketball, and I was surprised how well Tyrus matched up.
Here are the in-depth stats, this time for the full '08-'09 season (instead of just since-December) because 82games doesn't provide by-month data:
Distribution of shots
Amare, age 21 - Jumpers: 53% of attempts, 35.6 eFG%. Close non-dunks: 29% of attempts, 48.8 eFG%. Dunks: 15% of attempts, 88.2 eFG%.
Tyrus, age 22 - Jumpers: 54% of attempts, 34.8 eFG%, Close non-dunks: 26% of attempts, 37.7 eFG%. Dunks: 18% of attempts, 82.8 eFG%.
The drastic difference between their eFG% on close non-dunks combined with Tyrus' higher TS% since December indicates Tyrus' percentages are much higher since December. My guess would be his Jumper and Close non-dunks percentages both improved by about 5%.
Below are the rate numbers, again for the full seasons since I don't have split info.
Amare, age 21 - FT draw%: 19.7, RB%:14.0, Ast%: 7.0, TO%: 14.4.
Tyrus, age 22- FT draw%: 16.9, RB%: 13.5, Ast%: 6.1, TO%: 14.3.