Nope, your Information is flawed. All ICHs for S775 since ICH6 had between 4 and 6 PCIe-Lanes integrated for periphals and expansion slots, while the MCH contained sixteen to 32 (X38/48) of them for graphics or non at all on specific IGP-chipsets. Since DMI is PCIe based you could say the ICH had in fact 8 to 10 Lanes integrated.
This is the reason why crossfire wasn't very useful on P965 or P35, where Intel only allowed a secon mechanical x16 slot, being electricaly x4 and linked to the ICH. So it was limited to only 1GB/s bandwith plus it had to take a detour via the ICH to MCH via DMI, then to the first GPU. Not that it would have been impossible to split the 16 Lanes from the MCH to 2x8, it only needs some switch ICs and no extra logic in the MCH to do that, but Intel did only allow that on 975X.
Now with Ibex Peak (P55/H57 etc.), this was increased to 8 Lanes (12 with DMI included), while X58 still used ICH10 like P45 etc. With cougar Point, the Lanes were updated to support PCIe2.0 (500MB/s instead of 250MB/s), so DMI went up to DMI 2.0 with 2GB/s instead of 1GB/s, too.
Now X58 and X79 are a bit special, because both have spare lanes in the IOH (X58, 40 Lanes 2.0 total, 4 for DMI, 32 for graphics, leaving 4 for periphals) or the CPU (S2011, 44 Lanes 3.0 total, 4 for DMI, 32 for Graphics, leaving 8 for periphals). This is were your board comes in. Don't know exactly what, but part of the expansion slots and chips should be connected directly to the CPU insted of the PCH (expansion slots and SATA 6Gb/s would benefit the most).
Since 8 Lanes for Periphals and expansion Slots in S1156/1155 is a bit low these days, most manufacturers use an 8 Lane PCIe-Switch from PLX, connected to one or more Lanes from the PCH and switching between several expansion slots and chips. This will be a bottleneck if the chips connected use more bandwith simultaneously than the connection to the PCH.
The point is, apart from the FDI routing the display signals from the IGP in the CPU out, the PCH is exactly a renamed ICH, albeit with more or faster generations of everything. You would only have to google a block diagram for any S775 chipset and compare it with a S1155 chipset to confirm what I'm talking about.