Absolutely a choice for a porty, they wands come with a full 2" bore, this little detail will help any portable perform better (assuming it's a serious machine and not a single vac unit), the 2" vac hose is also an important detail, any 2 or 3 vac porty should come standard with 2" pipe, anything less is restrictive. To make good use of the GreenHorn wand I would want a pump capable of 300 psi and at least 1gpm real flow, a small 100 psi unit wouldn't be a good idea. That said all the other principles for better cleaning and drying are the same, so using a TM rated wand on a porty is a good investment for later when you upgrade.
The worst thing you can do for a porty is use small hose and a cheap poorly designed wand, there are no savings with a $200 wand.