Yes, that is correct. Road BB shells are always 68mm though so a Truvativ Elita road triple would not need any spacers ever as its spindle length will only accommodate a 68mm shell. MTB BB shells can be either 68 or 73mm so the 68mm shells make do with spacers to allow crankset manufacturers to only have to produce one spindle length.

I did misspeak earlier when I commented that the Elita crank would not come with spacers. No Truvativ/SRAM GXP cranks come with spacers as far as I can tell. The spacers always come with the bottom bracket cups which are shared between road and MTB cranks (unlike Shimano who has different cups for road and MTB and includes the BB cups with MTB cranks).